1055106061021 has 4 divisors (see below), whose sum is σ = 1117171123452. Its totient is φ = 993040998592.

The previous prime is 1055106061013. The next prime is 1055106061099. The reversal of 1055106061021 is 1201606015501.

It is a happy number.

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 738463516921 + 316642544100 = 859339^2 + 562710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055106061021 - 2³ = 1055106061013 is a prime.

It is a super-2 number, since 2×1055106061021² (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 (1055106061921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31032531190 + ... + 31032531223.

It is an arithmetic number, because the mean of its divisors is an integer number (279292780863).

Almost surely, 2^{1055106061021} is an apocalyptic number.

It is an amenable number.

1055106061021 is a deficient number, since it is larger than the sum of its proper divisors (62065062431).

1055106061021 is an equidigital number, since it uses as much as digits as its factorization.

1055106061021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62065062430.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 1055106061021 in words is "one trillion, fifty-five billion, one hundred six million, sixty-one thousand, twenty-one".