31112131000 has 32 divisors (see below), whose sum is σ = 72802388880. Its totient is φ = 12444852000.

The previous prime is 31112130991. The next prime is 31112131013. The reversal of 31112131000 is 13121113.

It is a super-3 number, since 3×31112131000³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 15555066 + ... + 15557065.

Almost surely, 2^31112131000 is an apocalyptic number.

It is an amenable number.

31112131000 is an abundant number, since it is smaller than the sum of its proper divisors (41690257880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31112131000 is a wasteful number, since it uses less digits than its factorization.

31112131000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31112152 (or 31112138 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31112131000 its reverse (13121113), we get a palindrome (31125252113).

The spelling of 31112131000 in words is "thirty-one billion, one hundred twelve million, one hundred thirty-one thousand".