79001120221 has 4 divisors (see below), whose sum is σ = 79038229500. Its totient is φ = 78964010944.

The previous prime is 79001120213. The next prime is 79001120251. The reversal of 79001120221 is 12202110097.

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 36559352025 + 42441768196 = 191205^2 + 206014^2 .

It is a cyclic number.

It is not a de Polignac number, because 79001120221 - 2³ = 79001120213 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 (79001120251) 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, 18551446 + ... + 18555703.

It is an arithmetic number, because the mean of its divisors is an integer number (19759557375).

Almost surely, 2^79001120221 is an apocalyptic number.

It is an amenable number.

79001120221 is a deficient number, since it is larger than the sum of its proper divisors (37109279).

79001120221 is a wasteful number, since it uses less digits than its factorization.

79001120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37109278.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 79001120221 in words is "seventy-nine billion, one million, one hundred twenty thousand, two hundred twenty-one".