31020123013111 has 8 divisors (see below), whose sum is σ = 31161458371680. Its totient is φ = 30878838753312.

The previous prime is 31020123013079. The next prime is 31020123013141. The reversal of 31020123013111 is 11131032102013.

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 31020123013111 - 2⁵ = 31020123013079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020123013141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11557540 + ... + 13986313.

It is an arithmetic number, because the mean of its divisors is an integer number (3895182296460).

Almost surely, 2^{31020123013111} is an apocalyptic number.

31020123013111 is a deficient number, since it is larger than the sum of its proper divisors (141335358569).

31020123013111 is a wasteful number, since it uses less digits than its factorization.

31020123013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25549385.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31020123013111 its reverse (11131032102013), we get a palindrome (42151155115124).

The spelling of 31020123013111 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, thirteen thousand, one hundred eleven".