22145122031 has 4 divisors (see below), whose sum is σ = 22148701752. Its totient is φ = 22141542312.

The previous prime is 22145121989. The next prime is 22145122057. The reversal of 22145122031 is 13022154122.

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 22145122031 - 2¹⁰ = 22145121007 is a prime.

It is a super-2 number, since 2×22145122031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22145121988 and 22145122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145122061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780565 + ... + 1792958.

It is an arithmetic number, because the mean of its divisors is an integer number (5537175438).

Almost surely, 2^22145122031 is an apocalyptic number.

22145122031 is a deficient number, since it is larger than the sum of its proper divisors (3579721).

22145122031 is an equidigital number, since it uses as much as digits as its factorization.

22145122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579720.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 22145122031 its reverse (13022154122), we get a palindrome (35167276153).

The spelling of 22145122031 in words is "twenty-two billion, one hundred forty-five million, one hundred twenty-two thousand, thirty-one".