221421186795139 has 2 divisors, whose sum is σ = 221421186795140. Its totient is φ = 221421186795138.

The previous prime is 221421186795073. The next prime is 221421186795163. The reversal of 221421186795139 is 931597681124122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221421186795139 - 2³³ = 221412596860547 is a prime.

It is not a weakly prime, because it can be changed into another prime (221421186798139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710593397569 + 110710593397570.

It is an arithmetic number, because the mean of its divisors is an integer number (110710593397570).

Almost surely, 2^{221421186795139} is an apocalyptic number.

221421186795139 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421186795139 is an equidigital number, since it uses as much as digits as its factorization.

221421186795139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 61.

The spelling of 221421186795139 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, one hundred eighty-six million, seven hundred ninety-five thousand, one hundred thirty-nine".