12222002021 has 8 divisors (see below), whose sum is σ = 12365228664. Its totient is φ = 12079211200.

The previous prime is 12222002017. The next prime is 12222002033. The reversal of 12222002021 is 12020022221.

It can be written as a sum of positive squares in 4 ways, for example, as 65836996 + 12156165025 = 8114^2 + 110255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12222002021 - 2² = 12222002017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222001987 and 12222002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222002011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52370 + ... + 164883.

It is an arithmetic number, because the mean of its divisors is an integer number (1545653583).

Almost surely, 2^12222002021 is an apocalyptic number.

It is an amenable number.

12222002021 is a deficient number, since it is larger than the sum of its proper divisors (143226643).

12222002021 is a wasteful number, since it uses less digits than its factorization.

12222002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217911.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12222002021 its reverse (12020022221), we get a palindrome (24242024242).

It can be divided in two parts, 1222200 and 2021, that added together give a palindrome (1224221).

The spelling of 12222002021 in words is "twelve billion, two hundred twenty-two million, two thousand, twenty-one".