121323231133320 has 64 divisors (see below), whose sum is σ = 363979946459520. Its totient is φ = 32351950252544.

The previous prime is 121323231133303. The next prime is 121323231133463. The reversal of 121323231133320 is 23331132323121.

It is a super-2 number, since 2×121323231133320² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9957429 + ... + 18487748.

It is an arithmetic number, because the mean of its divisors is an integer number (5687186663430).

Almost surely, 2^{121323231133320} is an apocalyptic number.

121323231133320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121323231133320 is an abundant number, since it is smaller than the sum of its proper divisors (242656715326200).

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

121323231133320 is a wasteful number, since it uses less digits than its factorization.

121323231133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28480734 (or 28480730 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 30.

Adding to 121323231133320 its reverse (23331132323121), we get a palindrome (144654363456441).

The spelling of 121323231133320 in words is "one hundred twenty-one trillion, three hundred twenty-three billion, two hundred thirty-one million, one hundred thirty-three thousand, three hundred twenty".