222401256604621 has 4 divisors (see below), whose sum is σ = 222401406596832. Its totient is φ = 222401106612412.

The previous prime is 222401256604603. The next prime is 222401256604627. The reversal of 222401256604621 is 126406652104222.

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 222401256604621 - 2⁷ = 222401256604493 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 (222401256604627) 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, 72749545 + ... + 75744958.

It is an arithmetic number, because the mean of its divisors is an integer number (55600351649208).

Almost surely, 2^{222401256604621} is an apocalyptic number.

It is an amenable number.

222401256604621 is a deficient number, since it is larger than the sum of its proper divisors (149992211).

222401256604621 is a wasteful number, since it uses less digits than its factorization.

222401256604621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149992210.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 222401256604621 in words is "two hundred twenty-two trillion, four hundred one billion, two hundred fifty-six million, six hundred four thousand, six hundred twenty-one".