22161750211 has 4 divisors (see below), whose sum is σ = 23125304592. Its totient is φ = 21198195832.

The previous prime is 22161750209. The next prime is 22161750269. The reversal of 22161750211 is 11205716122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22161750211 - 2¹ = 22161750209 is a prime.

It is a super-2 number, since 2×22161750211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22161750211.

It is not an unprimeable number, because it can be changed into a prime (22161750011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481777156 + ... + 481777201.

It is an arithmetic number, because the mean of its divisors is an integer number (5781326148).

Almost surely, 2^22161750211 is an apocalyptic number.

22161750211 is a deficient number, since it is larger than the sum of its proper divisors (963554381).

22161750211 is an equidigital number, since it uses as much as digits as its factorization.

22161750211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963554380.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 22161750211 in words is "twenty-two billion, one hundred sixty-one million, seven hundred fifty thousand, two hundred eleven".