21223332120091 has 2 divisors, whose sum is σ = 21223332120092. Its totient is φ = 21223332120090.

The previous prime is 21223332120079. The next prime is 21223332120101. The reversal of 21223332120091 is 19002123332212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223332120091 - 2⁴³ = 12427239097883 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223332120691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611666060045 + 10611666060046.

It is an arithmetic number, because the mean of its divisors is an integer number (10611666060046).

Almost surely, 2^{21223332120091} is an apocalyptic number.

21223332120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223332120091 is an equidigital number, since it uses as much as digits as its factorization.

21223332120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

It can be divided in two parts, 2122333 and 2120091, that added together give a palindrome (4242424).

The spelling of 21223332120091 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred thirty-two million, one hundred twenty thousand, ninety-one".