31000203123102 has 64 divisors (see below), whose sum is σ = 73744164576000. Its totient is φ = 9623613439584.

The previous prime is 31000203123061. The next prime is 31000203123103. The reversal of 31000203123102 is 20132130200013.

It is a super-2 number, since 2×31000203123102² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000203123103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255995593 + ... + 256116660.

It is an arithmetic number, because the mean of its divisors is an integer number (1152252571500).

Almost surely, 2^{31000203123102} is an apocalyptic number.

31000203123102 is an abundant number, since it is smaller than the sum of its proper divisors (42743961452898).

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

31000203123102 is a wasteful number, since it uses less digits than its factorization.

31000203123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512112342 (or 512112336 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31000203123102 its reverse (20132130200013), we get a palindrome (51132333323115).

The spelling of 31000203123102 in words is "thirty-one trillion, two hundred three million, one hundred twenty-three thousand, one hundred two".