21200220112091 has 2 divisors, whose sum is σ = 21200220112092. Its totient is φ = 21200220112090.

The previous prime is 21200220112033. The next prime is 21200220112171. The reversal of 21200220112091 is 19021102200212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200220112091 - 2¹⁴ = 21200220095707 is a prime.

It is a super-2 number, since 2×21200220112091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21200220117091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600110056045 + 10600110056046.

It is an arithmetic number, because the mean of its divisors is an integer number (10600110056046).

Almost surely, 2^{21200220112091} is an apocalyptic number.

21200220112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200220112091 is an equidigital number, since it uses as much as digits as its factorization.

21200220112091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21200220112091 in words is "twenty-one trillion, two hundred billion, two hundred twenty million, one hundred twelve thousand, ninety-one".