21101222012179 has 2 divisors, whose sum is σ = 21101222012180. Its totient is φ = 21101222012178.

The previous prime is 21101222012141. The next prime is 21101222012183. The reversal of 21101222012179 is 97121022210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101222012179 - 2¹¹ = 21101222010131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101222012179.

It is not a weakly prime, because it can be changed into another prime (21101222712179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550611006089 + 10550611006090.

It is an arithmetic number, because the mean of its divisors is an integer number (10550611006090).

Almost surely, 2^{21101222012179} is an apocalyptic number.

21101222012179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101222012179 is an equidigital number, since it uses as much as digits as its factorization.

21101222012179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 21101222012179 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-two million, twelve thousand, one hundred seventy-nine".