7225561252021 has 4 divisors (see below), whose sum is σ = 8257784288032. Its totient is φ = 6193338216012.

The previous prime is 7225561252001. The next prime is 7225561252097. The reversal of 7225561252021 is 1202521655227.

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 7225561252021 - 2¹⁹ = 7225560727733 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 (7225561252001) 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, 516111517995 + ... + 516111518008.

It is an arithmetic number, because the mean of its divisors is an integer number (2064446072008).

Almost surely, 2^{7225561252021} is an apocalyptic number.

It is an amenable number.

7225561252021 is a deficient number, since it is larger than the sum of its proper divisors (1032223036011).

7225561252021 is a wasteful number, since it uses less digits than its factorization.

7225561252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032223036010.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 7225561252021 in words is "seven trillion, two hundred twenty-five billion, five hundred sixty-one million, two hundred fifty-two thousand, twenty-one".