221201211079 has 2 divisors, whose sum is σ = 221201211080. Its totient is φ = 221201211078.

The previous prime is 221201211059. The next prime is 221201211137. The reversal of 221201211079 is 970112102122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221201211079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221201211059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600605539 + 110600605540.

It is an arithmetic number, because the mean of its divisors is an integer number (110600605540).

Almost surely, 2^221201211079 is an apocalyptic number.

221201211079 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201211079 is an equidigital number, since it uses as much as digits as its factorization.

221201211079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 221201211079 in words is "two hundred twenty-one billion, two hundred one million, two hundred eleven thousand, seventy-nine".