31321023102 has 12 divisors (see below), whose sum is σ = 67862216760. Its totient is φ = 10440341028.

The previous prime is 31321023077. The next prime is 31321023121. The reversal of 31321023102 is 20132012313.

31321023102 is a `hidden beast` number, since 31 + 321 + 0 + 2 + 310 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1740056839 = 31321023102 / (3 + 1 + 3 + 2 + 1 + 0 + 2 + 3 + 1 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 870028402 + ... + 870028437.

It is an arithmetic number, because the mean of its divisors is an integer number (5655184730).

Almost surely, 2^31321023102 is an apocalyptic number.

31321023102 is an abundant number, since it is smaller than the sum of its proper divisors (36541193658).

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

31321023102 is a wasteful number, since it uses less digits than its factorization.

31321023102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740056847 (or 1740056844 counting only the distinct ones).

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

Adding to 31321023102 its reverse (20132012313), we get a palindrome (51453035415).

The spelling of 31321023102 in words is "thirty-one billion, three hundred twenty-one million, twenty-three thousand, one hundred two".