220221211200021 has 12 divisors (see below), whose sum is σ = 334839268491520. Its totient is φ = 139087080757800.

The previous prime is 220221211199993. The next prime is 220221211200031. The reversal of 220221211200021 is 120002112122022.

It is a happy number.

220221211200021 is a `hidden beast` number, since 220 + 2 + 212 + 11 + 200 + 0 + 21 = 666.

It is not a de Polignac number, because 220221211200021 - 2⁷ = 220221211199893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221211199967 and 220221211200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221211200031) 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, 643921670005 + ... + 643921670346.

Almost surely, 2^{220221211200021} is an apocalyptic number.

It is an amenable number.

220221211200021 is a deficient number, since it is larger than the sum of its proper divisors (114618057291499).

220221211200021 is a wasteful number, since it uses less digits than its factorization.

220221211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287843340376 (or 1287843340373 counting only the distinct ones).

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

Adding to 220221211200021 its reverse (120002112122022), we get a palindrome (340223323322043).

The spelling of 220221211200021 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred thousand, twenty-one".