12022116521 has 4 divisors (see below), whose sum is σ = 12024918612. Its totient is φ = 12019314432.

The previous prime is 12022116499. The next prime is 12022116599. The reversal of 12022116521 is 12561122021.

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 10173546496 + 1848570025 = 100864^2 + 42995^2 .

It is a cyclic number.

It is not a de Polignac number, because 12022116521 - 2²⁶ = 11955007657 is a prime.

It is a super-2 number, since 2×12022116521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12022166521) 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, 1394600 + ... + 1403193.

It is an arithmetic number, because the mean of its divisors is an integer number (3006229653).

Almost surely, 2^12022116521 is an apocalyptic number.

It is an amenable number.

12022116521 is a deficient number, since it is larger than the sum of its proper divisors (2802091).

12022116521 is an equidigital number, since it uses as much as digits as its factorization.

12022116521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802090.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 12022116521 its reverse (12561122021), we get a palindrome (24583238542).

The spelling of 12022116521 in words is "twelve billion, twenty-two million, one hundred sixteen thousand, five hundred twenty-one".