21100211223199 has 2 divisors, whose sum is σ = 21100211223200. Its totient is φ = 21100211223198.

The previous prime is 21100211223187. The next prime is 21100211223227. The reversal of 21100211223199 is 99132211200112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100211223199 - 2¹⁷ = 21100211092127 is a prime.

It is a super-2 number, since 2×21100211223199² (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 (21100251223199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550105611599 + 10550105611600.

It is an arithmetic number, because the mean of its divisors is an integer number (10550105611600).

Almost surely, 2^{21100211223199} is an apocalyptic number.

21100211223199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100211223199 is an equidigital number, since it uses as much as digits as its factorization.

21100211223199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 21100211223199 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred twenty-three thousand, one hundred ninety-nine".