1179634364221 has 4 divisors (see below), whose sum is σ = 1179637066972. Its totient is φ = 1179631661472.

The previous prime is 1179634364179. The next prime is 1179634364273. The reversal of 1179634364221 is 1224634369711.

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 461123841721 + 718510522500 = 679061^2 + 847650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1179634364221 - 2⁷ = 1179634364093 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 (1179634364621) 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, 530466 + ... + 1625011.

It is an arithmetic number, because the mean of its divisors is an integer number (294909266743).

Almost surely, 2^{1179634364221} is an apocalyptic number.

It is an amenable number.

1179634364221 is a deficient number, since it is larger than the sum of its proper divisors (2702751).

1179634364221 is an equidigital number, since it uses as much as digits as its factorization.

1179634364221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702750.

The product of its digits is 1306368, while the sum is 49.

The spelling of 1179634364221 in words is "one trillion, one hundred seventy-nine billion, six hundred thirty-four million, three hundred sixty-four thousand, two hundred twenty-one".