31020123101 has 16 divisors (see below), whose sum is σ = 34273471680. Its totient is φ = 27839982720.

The previous prime is 31020123059. The next prime is 31020123103. The reversal of 31020123101 is 10132102013.

It is a de Polignac number, because none of the positive numbers 2^k-31020123101 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 (31020123103) 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, 615026 + ... + 663548.

It is an arithmetic number, because the mean of its divisors is an integer number (2142091980).

Almost surely, 2^31020123101 is an apocalyptic number.

It is an amenable number.

31020123101 is a deficient number, since it is larger than the sum of its proper divisors (3253348579).

31020123101 is a wasteful number, since it uses less digits than its factorization.

31020123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49276.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31020123101 its reverse (10132102013), we get a palindrome (41152225114).

The spelling of 31020123101 in words is "thirty-one billion, twenty million, one hundred twenty-three thousand, one hundred one".