21221201100199 has 2 divisors, whose sum is σ = 21221201100200. Its totient is φ = 21221201100198.

The previous prime is 21221201100181. The next prime is 21221201100221. The reversal of 21221201100199 is 99100110212212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221201100199 - 2²⁷ = 21221066882471 is a prime.

It is a super-2 number, since 2×21221201100199² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21221201100199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221201100119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610600550099 + 10610600550100.

It is an arithmetic number, because the mean of its divisors is an integer number (10610600550100).

Almost surely, 2^{21221201100199} is an apocalyptic number.

21221201100199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221201100199 is an equidigital number, since it uses as much as digits as its factorization.

21221201100199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21221201100199 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, one hundred thousand, one hundred ninety-nine".