31220102000 has 40 divisors (see below), whose sum is σ = 75490211472. Its totient is φ = 12488040000.

The previous prime is 31220101999. The next prime is 31220102033. The reversal of 31220102000 is 20102213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 7803026 + ... + 7807025.

Almost surely, 2^31220102000 is an apocalyptic number.

It is an amenable number.

31220102000 is an abundant number, since it is smaller than the sum of its proper divisors (44270109472).

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

31220102000 is a wasteful number, since it uses less digits than its factorization.

31220102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15610074 (or 15610058 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 31220102000 its reverse (20102213), we get a palindrome (31240204213).

The spelling of 31220102000 in words is "thirty-one billion, two hundred twenty million, one hundred two thousand".