1056326546221 has 4 divisors (see below), whose sum is σ = 1056447707200. Its totient is φ = 1056205385244.

The previous prime is 1056326546213. The next prime is 1056326546263. The reversal of 1056326546221 is 1226456236501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1056326546221 - 2³ = 1056326546213 is a prime.

It is a super-2 number, since 2×1056326546221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056326546021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60567411 + ... + 60584848.

It is an arithmetic number, because the mean of its divisors is an integer number (264111926800).

Almost surely, 2^{1056326546221} is an apocalyptic number.

It is an amenable number.

1056326546221 is a deficient number, since it is larger than the sum of its proper divisors (121160979).

1056326546221 is an equidigital number, since it uses as much as digits as its factorization.

1056326546221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121160978.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 1056326546221 in words is "one trillion, fifty-six billion, three hundred twenty-six million, five hundred forty-six thousand, two hundred twenty-one".