121121120010 has 256 divisors, whose sum is σ = 339201146880. Its totient is φ = 27371520000.

The previous prime is 121121120009. The next prime is 121121120023. The reversal of 121121120010 is 10021121121.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122220615 + ... + 122221605.

It is an arithmetic number, because the mean of its divisors is an integer number (1325004480).

Almost surely, 2^121121120010 is an apocalyptic number.

121121120010 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 121121120010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169600573440).

121121120010 is an abundant number, since it is smaller than the sum of its proper divisors (218080026870).

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

121121120010 is a wasteful number, since it uses less digits than its factorization.

121121120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

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

Adding to 121121120010 its reverse (10021121121), we get a palindrome (131142241131).

The spelling of 121121120010 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, ten".