31311100121 has 8 divisors (see below), whose sum is σ = 35785612800. Its totient is φ = 26836962048.

The previous prime is 31311100111. The next prime is 31311100133. The reversal of 31311100121 is 12100111313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311100121 - 2³⁴ = 14131230937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311100096 and 31311100105.

It is not an unprimeable number, because it can be changed into a prime (31311100111) 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, 117080 + ... + 276278.

It is an arithmetic number, because the mean of its divisors is an integer number (4473201600).

Almost surely, 2^31311100121 is an apocalyptic number.

It is an amenable number.

31311100121 is a deficient number, since it is larger than the sum of its proper divisors (4474512679).

31311100121 is a wasteful number, since it uses less digits than its factorization.

31311100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187303.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31311100121 its reverse (12100111313), we get a palindrome (43411211434).

The spelling of 31311100121 in words is "thirty-one billion, three hundred eleven million, one hundred thousand, one hundred twenty-one".