1031061561221 has 8 divisors (see below), whose sum is σ = 1085337614400. Its totient is φ = 976786473600.

The previous prime is 1031061561203. The next prime is 1031061561227. The reversal of 1031061561221 is 1221651601301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1031061561221 - 2¹⁰ = 1031061560197 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3232565 + ... + 3537173.

It is an arithmetic number, because the mean of its divisors is an integer number (135667201800).

Almost surely, 2^{1031061561221} is an apocalyptic number.

It is an amenable number.

1031061561221 is a deficient number, since it is larger than the sum of its proper divisors (54276053179).

1031061561221 is a wasteful number, since it uses less digits than its factorization.

1031061561221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482779.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 1031061561221 in words is "one trillion, thirty-one billion, sixty-one million, five hundred sixty-one thousand, two hundred twenty-one".