221525632512091 has 2 divisors, whose sum is σ = 221525632512092. Its totient is φ = 221525632512090.

The previous prime is 221525632512049. The next prime is 221525632512101. The reversal of 221525632512091 is 190215236525122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221525632512091 - 2¹⁵ = 221525632479323 is a prime.

It is a super-2 number, since 2×221525632512091² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221525632512001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110762816256045 + 110762816256046.

It is an arithmetic number, because the mean of its divisors is an integer number (110762816256046).

Almost surely, 2^{221525632512091} is an apocalyptic number.

221525632512091 is a deficient number, since it is larger than the sum of its proper divisors (1).

221525632512091 is an equidigital number, since it uses as much as digits as its factorization.

221525632512091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 221525632512091 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, six hundred thirty-two million, five hundred twelve thousand, ninety-one".