121321421310 has 16 divisors (see below), whose sum is σ = 291171411216. Its totient is φ = 32352379008.

The previous prime is 121321421303. The next prime is 121321421311. The reversal of 121321421310 is 13124123121.

It is a super-2 number, since 2×121321421310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321421311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022023659 + ... + 2022023718.

It is an arithmetic number, because the mean of its divisors is an integer number (18198213201).

Almost surely, 2^121321421310 is an apocalyptic number.

121321421310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321421310 is an abundant number, since it is smaller than the sum of its proper divisors (169849989906).

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

121321421310 is a wasteful number, since it uses less digits than its factorization.

121321421310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044047387.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121321421310 its reverse (13124123121), we get a palindrome (134445544431).

The spelling of 121321421310 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, three hundred ten".