220012212001021 has 16 divisors (see below), whose sum is σ = 241369244504640. Its totient is φ = 198881306052480.

The previous prime is 220012212000989. The next prime is 220012212001027. The reversal of 220012212001021 is 120100212210022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220012212001021 - 2⁵ = 220012212000989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220012212000986 and 220012212001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012212001027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28136815 + ... + 35095651.

It is an arithmetic number, because the mean of its divisors is an integer number (15085577781540).

Almost surely, 2^{220012212001021} is an apocalyptic number.

It is an amenable number.

220012212001021 is a deficient number, since it is larger than the sum of its proper divisors (21357032503619).

220012212001021 is a wasteful number, since it uses less digits than its factorization.

220012212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975084.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220012212001021 its reverse (120100212210022), we get a palindrome (340112424211043).

The spelling of 220012212001021 in words is "two hundred twenty trillion, twelve billion, two hundred twelve million, one thousand, twenty-one".