2221296521 has 4 divisors (see below), whose sum is σ = 2222841600. Its totient is φ = 2219751444.

The previous prime is 2221296509. The next prime is 2221296541. The reversal of 2221296521 is 1256921222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221296521 - 2¹⁴ = 2221280137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221296541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770381 + ... + 773258.

It is an arithmetic number, because the mean of its divisors is an integer number (555710400).

Almost surely, 2^2221296521 is an apocalyptic number.

It is an amenable number.

2221296521 is a deficient number, since it is larger than the sum of its proper divisors (1545079).

2221296521 is a wasteful number, since it uses less digits than its factorization.

2221296521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545078.

The product of its digits is 8640, while the sum is 32.

The square root of 2221296521 is about 47130.6325121995. The cubic root of 2221296521 is about 1304.7746553352.

The spelling of 2221296521 in words is "two billion, two hundred twenty-one million, two hundred ninety-six thousand, five hundred twenty-one".