31001012102 has 4 divisors (see below), whose sum is σ = 46501518156. Its totient is φ = 15500506050.

The previous prime is 31001012059. The next prime is 31001012129. The reversal of 31001012102 is 20121010013.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31001012102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750253024 + ... + 7750253027.

It is an arithmetic number, because the mean of its divisors is an integer number (11625379539).

Almost surely, 2^31001012102 is an apocalyptic number.

31001012102 is a deficient number, since it is larger than the sum of its proper divisors (15500506054).

31001012102 is a wasteful number, since it uses less digits than its factorization.

31001012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500506053.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31001012102 its reverse (20121010013), we get a palindrome (51122022115).

The spelling of 31001012102 in words is "thirty-one billion, one million, twelve thousand, one hundred two".