22120031 has 2 divisors, whose sum is σ = 22120032. Its totient is φ = 22120030.

The previous prime is 22119989. The next prime is 22120057. The reversal of 22120031 is 13002122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22120031 - 2¹⁸ = 21857887 is a prime.

It is a super-2 number, since 2×22120031² = 978591542881922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22119994 and 22120021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22120061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060015 + 11060016.

It is an arithmetic number, because the mean of its divisors is an integer number (11060016).

Almost surely, 2^22120031 is an apocalyptic number.

22120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120031 is an equidigital number, since it uses as much as digits as its factorization.

22120031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22120031 is about 4703.1937021560. The cubic root of 22120031 is about 280.7126023993.

Adding to 22120031 its reverse (13002122), we get a palindrome (35122153).

The spelling of 22120031 in words is "twenty-two million, one hundred twenty thousand, thirty-one".