1002164556121 has 4 divisors (see below), whose sum is σ = 1002285701172. Its totient is φ = 1002043411072.

The previous prime is 1002164556067. The next prime is 1002164556137. The reversal of 1002164556121 is 1216554612001.

1002164556121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 389701796121 + 612462760000 = 624261^2 + 782600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002164556121 - 2³⁵ = 967804817753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012164556121) 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, 60560116 + ... + 60576661.

It is an arithmetic number, because the mean of its divisors is an integer number (250571425293).

Almost surely, 2^{1002164556121} is an apocalyptic number.

It is an amenable number.

1002164556121 is a deficient number, since it is larger than the sum of its proper divisors (121145051).

1002164556121 is an equidigital number, since it uses as much as digits as its factorization.

1002164556121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121145050.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 1002164556121 in words is "one trillion, two billion, one hundred sixty-four million, five hundred fifty-six thousand, one hundred twenty-one".