7900221011 has 4 divisors (see below), whose sum is σ = 8364939912. Its totient is φ = 7435502112.

The previous prime is 7900221001. The next prime is 7900221029. The reversal of 7900221011 is 1101220097.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7900221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7900221001) 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, 232359425 + ... + 232359458.

It is an arithmetic number, because the mean of its divisors is an integer number (2091234978).

Almost surely, 2^7900221011 is an apocalyptic number.

7900221011 is a deficient number, since it is larger than the sum of its proper divisors (464718901).

7900221011 is a wasteful number, since it uses less digits than its factorization.

7900221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464718900.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 7900221011 is about 88883.1874484708. The cubic root of 7900221011 is about 1991.6502737966.

The spelling of 7900221011 in words is "seven billion, nine hundred million, two hundred twenty-one thousand, eleven".