22131133331 has 4 divisors (see below), whose sum is σ = 22175132112. Its totient is φ = 22087134552.

The previous prime is 22131133279. The next prime is 22131133333. The reversal of 22131133331 is 13333113122.

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 22131133331 - 2²² = 22126939027 is a prime.

It is a super-2 number, since 2×22131133331² (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 = 22131133297 and 22131133306.

It is not an unprimeable number, because it can be changed into a prime (22131133333) 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, 21998636 + ... + 21999641.

It is an arithmetic number, because the mean of its divisors is an integer number (5543783028).

Almost surely, 2^22131133331 is an apocalyptic number.

22131133331 is a deficient number, since it is larger than the sum of its proper divisors (43998781).

22131133331 is an equidigital number, since it uses as much as digits as its factorization.

22131133331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43998780.

The product of its digits is 972, while the sum is 23.

Adding to 22131133331 its reverse (13333113122), we get a palindrome (35464246453).

The spelling of 22131133331 in words is "twenty-two billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred thirty-one".