31220102032 has 40 divisors (see below), whose sum is σ = 69143003136. Its totient is φ = 13377570816.

The previous prime is 31220101999. The next prime is 31220102033. The reversal of 31220102032 is 23020102213.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31220101997 and 31220102015.

It is not an unprimeable number, because it can be changed into a prime (31220102033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665328 + ... + 710704.

Almost surely, 2^31220102032 is an apocalyptic number.

It is an amenable number.

31220102032 is an abundant number, since it is smaller than the sum of its proper divisors (37922901104).

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

31220102032 is a wasteful number, since it uses less digits than its factorization.

31220102032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51535 (or 51529 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31220102032 its reverse (23020102213), we get a palindrome (54240204245).

The spelling of 31220102032 in words is "thirty-one billion, two hundred twenty million, one hundred two thousand, thirty-two".