31131211111010 has 16 divisors (see below), whose sum is σ = 58472535652416. Its totient is φ = 11911072077168.

The previous prime is 31131211111003. The next prime is 31131211111031. The reversal of 31131211111010 is 1011111213113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31131211111010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67676545664 + ... + 67676546123.

It is an arithmetic number, because the mean of its divisors is an integer number (3654533478276).

Almost surely, 2^{31131211111010} is an apocalyptic number.

31131211111010 is a deficient number, since it is larger than the sum of its proper divisors (27341324541406).

31131211111010 is a wasteful number, since it uses less digits than its factorization.

31131211111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135353091817.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 31131211111010 its reverse (1011111213113), we get a palindrome (32142322324123).

The spelling of 31131211111010 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred eleven million, one hundred eleven thousand, ten".