22051212331 has 4 divisors (see below), whose sum is σ = 22316889672. Its totient is φ = 21785534992.

The previous prime is 22051212301. The next prime is 22051212341. The reversal of 22051212331 is 13321215022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13321215022 = 2 ⋅6660607511.

It is a cyclic number.

It is not a de Polignac number, because 22051212331 - 2⁷ = 22051212203 is a prime.

It is a super-2 number, since 2×22051212331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22051212301) 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, 132838546 + ... + 132838711.

It is an arithmetic number, because the mean of its divisors is an integer number (5579222418).

Almost surely, 2^22051212331 is an apocalyptic number.

22051212331 is a deficient number, since it is larger than the sum of its proper divisors (265677341).

22051212331 is an equidigital number, since it uses as much as digits as its factorization.

22051212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265677340.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 22051212331 its reverse (13321215022), we get a palindrome (35372427353).

The spelling of 22051212331 in words is "twenty-two billion, fifty-one million, two hundred twelve thousand, three hundred thirty-one".