121311120000031 has 4 divisors (see below), whose sum is σ = 130642744615432. Its totient is φ = 111979495384632.

The previous prime is 121311120000023. The next prime is 121311120000047. The reversal of 121311120000031 is 130000021113121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121311120000031 - 2³ = 121311120000023 is a prime.

It is a super-2 number, since 2×121311120000031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311120000061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665812307681 + ... + 4665812307706.

It is an arithmetic number, because the mean of its divisors is an integer number (32660686153858).

Almost surely, 2^{121311120000031} is an apocalyptic number.

121311120000031 is a deficient number, since it is larger than the sum of its proper divisors (9331624615401).

121311120000031 is an equidigital number, since it uses as much as digits as its factorization.

121311120000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331624615400.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121311120000031 its reverse (130000021113121), we get a palindrome (251311141113152).

The spelling of 121311120000031 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred twenty million, thirty-one", and thus it is an aban number.