31020311211123 has 16 divisors (see below), whose sum is σ = 45206791083776. Its totient is φ = 18804505531680.

The previous prime is 31020311211119. The next prime is 31020311211151. The reversal of 31020311211123 is 32111211302013.

It is not a de Polignac number, because 31020311211123 - 2² = 31020311211119 is a prime.

It is a super-2 number, since 2×31020311211123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020311211123.

It is not an unprimeable number, because it can be changed into a prime (31020311212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5935763023 + ... + 5935768248.

It is an arithmetic number, because the mean of its divisors is an integer number (2825424442736).

Almost surely, 2^{31020311211123} is an apocalyptic number.

31020311211123 is a deficient number, since it is larger than the sum of its proper divisors (14186479872653).

31020311211123 is a wasteful number, since it uses less digits than its factorization.

31020311211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11871531354.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31020311211123 its reverse (32111211302013), we get a palindrome (63131522513136).

The spelling of 31020311211123 in words is "thirty-one trillion, twenty billion, three hundred eleven million, two hundred eleven thousand, one hundred twenty-three".