121321313310 has 128 divisors (see below), whose sum is σ = 298149755904. Its totient is φ = 31588551680.

The previous prime is 121321313303. The next prime is 121321313341. The reversal of 121321313310 is 13313123121.

It is a happy number.

It is a super-2 number, since 2×121321313310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81917770 + ... + 81919250.

It is an arithmetic number, because the mean of its divisors is an integer number (2329294968).

Almost surely, 2^121321313310 is an apocalyptic number.

121321313310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321313310 is an abundant number, since it is smaller than the sum of its proper divisors (176828442594).

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

121321313310 is a wasteful number, since it uses less digits than its factorization.

121321313310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121321313310 its reverse (13313123121), we get a palindrome (134634436431).

The spelling of 121321313310 in words is "one hundred twenty-one billion, three hundred twenty-one million, three hundred thirteen thousand, three hundred ten".