12212001222021 has 12 divisors (see below), whose sum is σ = 18208575299200. Its totient is φ = 7878710465640.

The previous prime is 12212001222007. The next prime is 12212001222067. The reversal of 12212001222021 is 12022210021221.

It is a happy number.

12212001222021 is a `hidden beast` number, since 1 + 221 + 200 + 1 + 2 + 220 + 21 = 666.

It is not a de Polignac number, because 12212001222021 - 2⁵ = 12212001221989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212001221985 and 12212001222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212001222121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21885306571 + ... + 21885307128.

Almost surely, 2^{12212001222021} is an apocalyptic number.

It is an amenable number.

12212001222021 is a deficient number, since it is larger than the sum of its proper divisors (5996574077179).

12212001222021 is a wasteful number, since it uses less digits than its factorization.

12212001222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43770613736 (or 43770613733 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12212001222021 its reverse (12022210021221), we get a palindrome (24234211243242).

The spelling of 12212001222021 in words is "twelve trillion, two hundred twelve billion, one million, two hundred twenty-two thousand, twenty-one".