121021201210 has 64 divisors (see below), whose sum is σ = 268561827072. Its totient is φ = 38236455936.

The previous prime is 121021201207. The next prime is 121021201229. The reversal of 121021201210 is 12102120121.

It is a super-2 number, since 2×121021201210² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427497 + ... + 651763.

It is an arithmetic number, because the mean of its divisors is an integer number (4196278548).

Almost surely, 2^121021201210 is an apocalyptic number.

121021201210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021201210 is an abundant number, since it is smaller than the sum of its proper divisors (147540625862).

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

121021201210 is a wasteful number, since it uses less digits than its factorization.

121021201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224887.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021201210 its reverse (12102120121), we get a palindrome (133123321331).

The spelling of 121021201210 in words is "one hundred twenty-one billion, twenty-one million, two hundred one thousand, two hundred ten".