121323323100 has 144 divisors (see below), whose sum is σ = 409711776768. Its totient is φ = 27141000960.

The previous prime is 121323323087. The next prime is 121323323101. The reversal of 121323323100 is 1323323121.

It is a super-2 number, since 2×121323323100² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323323101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 515907 + ... + 713306.

It is an arithmetic number, because the mean of its divisors is an integer number (2845220672).

Almost surely, 2^121323323100 is an apocalyptic number.

121323323100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121323323100 is an abundant number, since it is smaller than the sum of its proper divisors (288388453668).

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

121323323100 is a wasteful number, since it uses less digits than its factorization.

121323323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229284 (or 1229277 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 121323323100 its sum of digits (21), we get a palindrome (121323323121).

Adding to 121323323100 its reverse (1323323121), we get a palindrome (122646646221).

The spelling of 121323323100 in words is "one hundred twenty-one billion, three hundred twenty-three million, three hundred twenty-three thousand, one hundred".