21220221220012 has 6 divisors (see below), whose sum is σ = 37135387135028. Its totient is φ = 10610110610004.

The previous prime is 21220221219997. The next prime is 21220221220027. The reversal of 21220221220012 is 21002212202212.

It is an interprime number because it is at equal distance from previous prime (21220221219997) and next prime (21220221220027).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652527652498 + ... + 2652527652505.

Almost surely, 2^{21220221220012} is an apocalyptic number.

It is an amenable number.

21220221220012 is a deficient number, since it is larger than the sum of its proper divisors (15915165915016).

21220221220012 is a wasteful number, since it uses less digits than its factorization.

21220221220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305055305007 (or 5305055305005 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21220221220012 its reverse (21002212202212), we get a palindrome (42222433422224).

The spelling of 21220221220012 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, twelve".