221647122934331 has 2 divisors, whose sum is σ = 221647122934332. Its totient is φ = 221647122934330.

The previous prime is 221647122934271. The next prime is 221647122934379. The reversal of 221647122934331 is 133439221746122.

221647122934331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221647122934331 - 2²⁶ = 221647055825467 is a prime.

It is a super-2 number, since 2×221647122934331² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221647122934331.

It is not a weakly prime, because it can be changed into another prime (221647122934931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110823561467165 + 110823561467166.

It is an arithmetic number, because the mean of its divisors is an integer number (110823561467166).

Almost surely, 2^{221647122934331} is an apocalyptic number.

221647122934331 is a deficient number, since it is larger than the sum of its proper divisors (1).

221647122934331 is an equidigital number, since it uses as much as digits as its factorization.

221647122934331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 50.

The spelling of 221647122934331 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, one hundred twenty-two million, nine hundred thirty-four thousand, three hundred thirty-one".