31111300012 has 24 divisors (see below), whose sum is σ = 58644626096. Its totient is φ = 14356173888.

The previous prime is 31111300001. The next prime is 31111300019. The reversal of 31111300012 is 21000311113.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 31111299965 and 31111300001.

It is not an unprimeable number, because it can be changed into a prime (31111300019) 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, 212683 + ... + 327805.

Almost surely, 2^31111300012 is an apocalyptic number.

It is an amenable number.

31111300012 is a deficient number, since it is larger than the sum of its proper divisors (27533326084).

31111300012 is a wasteful number, since it uses less digits than its factorization.

31111300012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120337 (or 120335 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31111300012 its reverse (21000311113), we get a palindrome (52111611125).

The spelling of 31111300012 in words is "thirty-one billion, one hundred eleven million, three hundred thousand, twelve".