21122102099999 has 4 divisors (see below), whose sum is σ = 21315882853320. Its totient is φ = 20928321346680.

The previous prime is 21122102099993. The next prime is 21122102100007. The reversal of 21122102099999 is 99999020122112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21122102099999 - 2³² = 21117807132703 is a prime.

It is a super-2 number, since 2×21122102099999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122102099993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96890376497 + ... + 96890376714.

It is an arithmetic number, because the mean of its divisors is an integer number (5328970713330).

Almost surely, 2^{21122102099999} is an apocalyptic number.

21122102099999 is a deficient number, since it is larger than the sum of its proper divisors (193780753321).

21122102099999 is a wasteful number, since it uses less digits than its factorization.

21122102099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193780753320.

The product of its (nonzero) digits is 944784, while the sum is 56.

The spelling of 21122102099999 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, ninety-nine thousand, nine hundred ninety-nine".