121012101210 has 384 divisors, whose sum is σ = 403560525312. Its totient is φ = 22581504000.

The previous prime is 121012101191. The next prime is 121012101251. The reversal of 121012101210 is 12101210121.

121012101210 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

121012101210 is a modest number, since divided by 12101210 gives 1210 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12217260 + ... + 12227160.

It is an arithmetic number, because the mean of its divisors is an integer number (1050938868).

Almost surely, 2^121012101210 is an apocalyptic number.

121012101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121012101210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201780262656).

121012101210 is an abundant number, since it is smaller than the sum of its proper divisors (282548424102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121012101210 is a wasteful number, since it uses less digits than its factorization.

121012101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9990 (or 9979 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121012101210 its reverse (12101210121), we get a palindrome (133113311331).

It can be divided in two parts, 121012 and 101210, that added together give a palindrome (222222).

The spelling of 121012101210 in words is "one hundred twenty-one billion, twelve million, one hundred one thousand, two hundred ten".