21102201479 has 2 divisors, whose sum is σ = 21102201480. Its totient is φ = 21102201478.

The previous prime is 21102201457. The next prime is 21102201499. The reversal of 21102201479 is 97410220112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102201479 - 2²⁴ = 21085424263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102201499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551100739 + 10551100740.

It is an arithmetic number, because the mean of its divisors is an integer number (10551100740).

Almost surely, 2^21102201479 is an apocalyptic number.

21102201479 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102201479 is an equidigital number, since it uses as much as digits as its factorization.

21102201479 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 29.

The spelling of 21102201479 in words is "twenty-one billion, one hundred two million, two hundred one thousand, four hundred seventy-nine".