222120210001 has 4 divisors (see below), whose sum is σ = 222124803904. Its totient is φ = 222115616100.

The previous prime is 222120209989. The next prime is 222120210041. The reversal of 222120210001 is 100012021222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100012021222 = 2 ⋅50006010611.

It is a cyclic number.

It is not a de Polignac number, because 222120210001 - 2¹⁵ = 222120177233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222120210041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223645 + ... + 2321386.

It is an arithmetic number, because the mean of its divisors is an integer number (55531200976).

Almost surely, 2^222120210001 is an apocalyptic number.

It is an amenable number.

222120210001 is a deficient number, since it is larger than the sum of its proper divisors (4593903).

222120210001 is an equidigital number, since it uses as much as digits as its factorization.

222120210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593902.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222120210001 its reverse (100012021222), we get a palindrome (322132231223).

The spelling of 222120210001 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred ten thousand, one".