21122121202199 has 16 divisors (see below), whose sum is σ = 21307636542720. Its totient is φ = 20936981520000.

The previous prime is 21122121202121. The next prime is 21122121202201. The reversal of 21122121202199 is 99120212122112.

It is a cyclic number.

It is not a de Polignac number, because 21122121202199 - 2⁸ = 21122121201943 is a prime.

It is a super-2 number, since 2×21122121202199² (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 (21122121207199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958386422 + ... + 958408460.

It is an arithmetic number, because the mean of its divisors is an integer number (1331727283920).

Almost surely, 2^{21122121202199} is an apocalyptic number.

21122121202199 is a deficient number, since it is larger than the sum of its proper divisors (185515340521).

21122121202199 is a wasteful number, since it uses less digits than its factorization.

21122121202199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30182.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 21122121202199 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred two thousand, one hundred ninety-nine".