2225577618421 has 2 divisors, whose sum is σ = 2225577618422. Its totient is φ = 2225577618420.

The previous prime is 2225577618353. The next prime is 2225577618487. The reversal of 2225577618421 is 1248167755222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2018925550321 + 206652068100 = 1420889^2 + 454590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2225577618421 - 2²³ = 2225569229813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2225577678421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112788809210 + 1112788809211.

It is an arithmetic number, because the mean of its divisors is an integer number (1112788809211).

Almost surely, 2^{2225577618421} is an apocalyptic number.

It is an amenable number.

2225577618421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2225577618421 is an equidigital number, since it uses as much as digits as its factorization.

2225577618421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 52.

The spelling of 2225577618421 in words is "two trillion, two hundred twenty-five billion, five hundred seventy-seven million, six hundred eighteen thousand, four hundred twenty-one".