22420112171 has 2 divisors, whose sum is σ = 22420112172. Its totient is φ = 22420112170.

The previous prime is 22420112167. The next prime is 22420112177. The reversal of 22420112171 is 17121102422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22420112171 - 2² = 22420112167 is a prime.

It is a super-2 number, since 2×22420112171² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22420112177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210056085 + 11210056086.

It is an arithmetic number, because the mean of its divisors is an integer number (11210056086).

Almost surely, 2^22420112171 is an apocalyptic number.

22420112171 is a deficient number, since it is larger than the sum of its proper divisors (1).

22420112171 is an equidigital number, since it uses as much as digits as its factorization.

22420112171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 22420112171 its reverse (17121102422), we get a palindrome (39541214593).

The spelling of 22420112171 in words is "twenty-two billion, four hundred twenty million, one hundred twelve thousand, one hundred seventy-one".