22120212691 has 2 divisors, whose sum is σ = 22120212692. Its totient is φ = 22120212690.

The previous prime is 22120212683. The next prime is 22120212757. The reversal of 22120212691 is 19621202122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22120212691 - 2³ = 22120212683 is a prime.

It is a super-2 number, since 2×22120212691² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22120212601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060106345 + 11060106346.

It is an arithmetic number, because the mean of its divisors is an integer number (11060106346).

Almost surely, 2^22120212691 is an apocalyptic number.

22120212691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120212691 is an equidigital number, since it uses as much as digits as its factorization.

22120212691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 22120212691 in words is "twenty-two billion, one hundred twenty million, two hundred twelve thousand, six hundred ninety-one".