12222000021 has 32 divisors (see below), whose sum is σ = 21386419200. Its totient is φ = 6014926080.

The previous prime is 12222000017. The next prime is 12222000031. The reversal of 12222000021 is 12000022221.

It is not a de Polignac number, because 12222000021 - 2² = 12222000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221999970 and 12222000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222000031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1387956 + ... + 1396733.

It is an arithmetic number, because the mean of its divisors is an integer number (668325600).

Almost surely, 2^12222000021 is an apocalyptic number.

12222000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222000021 is a deficient number, since it is larger than the sum of its proper divisors (9164419179).

12222000021 is a wasteful number, since it uses less digits than its factorization.

12222000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784729.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12222000021 its reverse (12000022221), we get a palindrome (24222022242).

The spelling of 12222000021 in words is "twelve billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.