121031311323 has 64 divisors (see below), whose sum is σ = 187697502720. Its totient is φ = 68729472000.

The previous prime is 121031311273. The next prime is 121031311343. The reversal of 121031311323 is 323113130121.

It is a happy number.

It is not a de Polignac number, because 121031311323 - 2⁸ = 121031311067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121031311323.

It is not an unprimeable number, because it can be changed into a prime (121031311343) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21294240 + ... + 21299922.

It is an arithmetic number, because the mean of its divisors is an integer number (2932773480).

Almost surely, 2^121031311323 is an apocalyptic number.

121031311323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121031311323 is a deficient number, since it is larger than the sum of its proper divisors (66666191397).

121031311323 is a wasteful number, since it uses less digits than its factorization.

121031311323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460.

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

Adding to 121031311323 its reverse (323113130121), we get a palindrome (444144441444).

The spelling of 121031311323 in words is "one hundred twenty-one billion, thirty-one million, three hundred eleven thousand, three hundred twenty-three".