1031061561220 has 24 divisors (see below), whose sum is σ = 2195725468608. Its totient is φ = 406615826400.

The previous prime is 1031061561203. The next prime is 1031061561227. The reversal of 1031061561220 is 221651601301.

It is not an unprimeable number, because it can be changed into a prime (1031061561227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363048426 + ... + 363051265.

It is an arithmetic number, because the mean of its divisors is an integer number (91488561192).

Almost surely, 2^{1031061561220} is an apocalyptic number.

1031061561220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031061561220 is an abundant number, since it is smaller than the sum of its proper divisors (1164663907388).

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

1031061561220 is a wasteful number, since it uses less digits than its factorization.

1031061561220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726099771 (or 726099769 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 1031061561220 in words is "one trillion, thirty-one billion, sixty-one million, five hundred sixty-one thousand, two hundred twenty".