1031020013220 has 48 divisors (see below), whose sum is σ = 2889364359168. Its totient is φ = 274699782400.

The previous prime is 1031020013209. The next prime is 1031020013249. The reversal of 1031020013220 is 223100201301.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1031020013220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7395609 + ... + 7533728.

It is an arithmetic number, because the mean of its divisors is an integer number (60195090816).

Almost surely, 2^{1031020013220} is an apocalyptic number.

1031020013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031020013220 is an abundant number, since it is smaller than the sum of its proper divisors (1858344345948).

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

1031020013220 is a wasteful number, since it uses less digits than its factorization.

1031020013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14930500 (or 14930498 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1031020013220 its reverse (223100201301), we get a palindrome (1254120214521).

The spelling of 1031020013220 in words is "one trillion, thirty-one billion, twenty million, thirteen thousand, two hundred twenty".