31033102012220 has 48 divisors (see below), whose sum is σ = 81250303454208. Its totient is φ = 9672655172160.

The previous prime is 31033102012169. The next prime is 31033102012247. The reversal of 31033102012220 is 2221020133013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31033102012192 and 31033102012201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10075680932 + ... + 10075684011.

It is an arithmetic number, because the mean of its divisors is an integer number (1692714655296).

Almost surely, 2^{31033102012220} is an apocalyptic number.

It is an amenable number.

31033102012220 is an abundant number, since it is smaller than the sum of its proper divisors (50217201441988).

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

31033102012220 is a wasteful number, since it uses less digits than its factorization.

31033102012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20151364970 (or 20151364968 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31033102012220 its reverse (2221020133013), we get a palindrome (33254122145233).

The spelling of 31033102012220 in words is "thirty-one trillion, thirty-three billion, one hundred two million, twelve thousand, two hundred twenty".