21999059101 has 2 divisors, whose sum is σ = 21999059102. Its totient is φ = 21999059100.

The previous prime is 21999059063. The next prime is 21999059143. The reversal of 21999059101 is 10195099912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20738880100 + 1260179001 = 144010^2 + 35499^2 .

It is a cyclic number.

It is not a de Polignac number, because 21999059101 - 2⁹ = 21999058589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21999959101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10999529550 + 10999529551.

It is an arithmetic number, because the mean of its divisors is an integer number (10999529551).

Almost surely, 2^21999059101 is an apocalyptic number.

It is an amenable number.

21999059101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21999059101 is an equidigital number, since it uses as much as digits as its factorization.

21999059101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 46.

The spelling of 21999059101 in words is "twenty-one billion, nine hundred ninety-nine million, fifty-nine thousand, one hundred one".