221331202979 has 2 divisors, whose sum is σ = 221331202980. Its totient is φ = 221331202978.

The previous prime is 221331202973. The next prime is 221331203017. The reversal of 221331202979 is 979202133122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221331202979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221331202973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110665601489 + 110665601490.

It is an arithmetic number, because the mean of its divisors is an integer number (110665601490).

Almost surely, 2^221331202979 is an apocalyptic number.

221331202979 is a deficient number, since it is larger than the sum of its proper divisors (1).

221331202979 is an equidigital number, since it uses as much as digits as its factorization.

221331202979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 221331202979 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred two thousand, nine hundred seventy-nine".