21122011212199 has 2 divisors, whose sum is σ = 21122011212200. Its totient is φ = 21122011212198.

The previous prime is 21122011212143. The next prime is 21122011212221. The reversal of 21122011212199 is 99121211022112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122011212199 is a prime.

It is a super-2 number, since 2×21122011212199² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122011212109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561005606099 + 10561005606100.

It is an arithmetic number, because the mean of its divisors is an integer number (10561005606100).

Almost surely, 2^{21122011212199} is an apocalyptic number.

21122011212199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122011212199 is an equidigital number, since it uses as much as digits as its factorization.

21122011212199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 21122011212199 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, two hundred twelve thousand, one hundred ninety-nine".