22131030422021 has 4 divisors (see below), whose sum is σ = 22131043962444. Its totient is φ = 22131016881600.

The previous prime is 22131030422009. The next prime is 22131030422047. The reversal of 22131030422021 is 12022403013122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20349472859521 + 1781557562500 = 4511039^2 + 1334750^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131030422021 - 2⁶ = 22131030421957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131030424021) 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, 3918020 + ... + 7720941.

It is an arithmetic number, because the mean of its divisors is an integer number (5532760990611).

Almost surely, 2^{22131030422021} is an apocalyptic number.

It is an amenable number.

22131030422021 is a deficient number, since it is larger than the sum of its proper divisors (13540423).

22131030422021 is a wasteful number, since it uses less digits than its factorization.

22131030422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540422.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 22131030422021 its reverse (12022403013122), we get a palindrome (34153433435143).

The spelling of 22131030422021 in words is "twenty-two trillion, one hundred thirty-one billion, thirty million, four hundred twenty-two thousand, twenty-one".