31030112112220 has 48 divisors (see below), whose sum is σ = 73869254756640. Its totient is φ = 10854257838336.

The previous prime is 31030112112113. The next prime is 31030112112227. The reversal of 31030112112220 is 2221121103013.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030112112227) by changing a digit.

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, 3140694667 + ... + 3140704546.

It is an arithmetic number, because the mean of its divisors is an integer number (1538942807430).

Almost surely, 2^{31030112112220} is an apocalyptic number.

It is an amenable number.

31030112112220 is an abundant number, since it is smaller than the sum of its proper divisors (42839142644420).

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

31030112112220 is a wasteful number, since it uses less digits than its factorization.

31030112112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281399254 (or 6281399252 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31030112112220 its reverse (2221121103013), we get a palindrome (33251233215233).

The spelling of 31030112112220 in words is "thirty-one trillion, thirty billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty".