1056570121601 has 4 divisors (see below), whose sum is σ = 1093003574100. Its totient is φ = 1020136669104.

The previous prime is 1056570121597. The next prime is 1056570121637. The reversal of 1056570121601 is 1061210756501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 341699871601 + 714870250000 = 584551^2 + 845500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056570121601 - 2² = 1056570121597 is a prime.

It is a super-2 number, since 2×1056570121601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056570124601) 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, 18216726206 + ... + 18216726263.

It is an arithmetic number, because the mean of its divisors is an integer number (273250893525).

Almost surely, 2^{1056570121601} is an apocalyptic number.

It is an amenable number.

1056570121601 is a deficient number, since it is larger than the sum of its proper divisors (36433452499).

1056570121601 is an equidigital number, since it uses as much as digits as its factorization.

1056570121601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36433452498.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 1056570121601 in words is "one trillion, fifty-six billion, five hundred seventy million, one hundred twenty-one thousand, six hundred one".