22195560421 has 2 divisors, whose sum is σ = 22195560422. Its totient is φ = 22195560420.

The previous prime is 22195560347. The next prime is 22195560461. The reversal of 22195560421 is 12406559122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20064722500 + 2130837921 = 141650^2 + 46161^2 .

It is a cyclic number.

It is not a de Polignac number, because 22195560421 - 2⁹ = 22195559909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22195560461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11097780210 + 11097780211.

It is an arithmetic number, because the mean of its divisors is an integer number (11097780211).

Almost surely, 2^22195560421 is an apocalyptic number.

It is an amenable number.

22195560421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22195560421 is an equidigital number, since it uses as much as digits as its factorization.

22195560421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

It can be divided in two parts, 221955 and 60421, that added together give a triangular number (282376 = T₇₅₁).

The spelling of 22195560421 in words is "twenty-two billion, one hundred ninety-five million, five hundred sixty thousand, four hundred twenty-one".