221421251423627 has 2 divisors, whose sum is σ = 221421251423628. Its totient is φ = 221421251423626.

The previous prime is 221421251423563. The next prime is 221421251423629. The reversal of 221421251423627 is 726324152124122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221421251423627 - 2⁶ = 221421251423563 is a prime.

Together with 221421251423629, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221421251423629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710625711813 + 110710625711814.

It is an arithmetic number, because the mean of its divisors is an integer number (110710625711814).

Almost surely, 2^{221421251423627} is an apocalyptic number.

221421251423627 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421251423627 is an equidigital number, since it uses as much as digits as its factorization.

221421251423627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 44.

The spelling of 221421251423627 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, four hundred twenty-three thousand, six hundred twenty-seven".