1031131020220 has 24 divisors (see below), whose sum is σ = 2474714448864. Its totient is φ = 353530635456.

The previous prime is 1031131020193. The next prime is 1031131020329. The reversal of 1031131020220 is 220201311301.

1031131020220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1031131020194 and 1031131020203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3682610647 + ... + 3682610926.

It is an arithmetic number, because the mean of its divisors is an integer number (103113102036).

Almost surely, 2^{1031131020220} is an apocalyptic number.

1031131020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031131020220 is an abundant number, since it is smaller than the sum of its proper divisors (1443583428644).

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

1031131020220 is a wasteful number, since it uses less digits than its factorization.

1031131020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365221589 (or 7365221587 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1031131020220 its reverse (220201311301), we get a palindrome (1251332331521).

The spelling of 1031131020220 in words is "one trillion, thirty-one billion, one hundred thirty-one million, twenty thousand, two hundred twenty".