121321135110 has 32 divisors (see below), whose sum is σ = 332766542592. Its totient is φ = 27730545120.

The previous prime is 121321135097. The next prime is 121321135213. The reversal of 121321135110 is 11531123121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288859636 + ... + 288860055.

It is an arithmetic number, because the mean of its divisors is an integer number (10398954456).

Almost surely, 2^121321135110 is an apocalyptic number.

121321135110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321135110 is an abundant number, since it is smaller than the sum of its proper divisors (211445407482).

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

121321135110 is a wasteful number, since it uses less digits than its factorization.

121321135110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577719708.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 121321135110 its reverse (11531123121), we get a palindrome (132852258231).

The spelling of 121321135110 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-five thousand, one hundred ten".