222221012100001 has 4 divisors (see below), whose sum is σ = 222312952943172. Its totient is φ = 222129071256832.

The previous prime is 222221012099993. The next prime is 222221012100019. The reversal of 222221012100001 is 100001210122222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 181257108006976 + 40963904093025 = 13463176^2 + 6400305^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221012100001 - 2³ = 222221012099993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222221012100041) 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, 45970417960 + ... + 45970422793.

It is an arithmetic number, because the mean of its divisors is an integer number (55578238235793).

Almost surely, 2^{222221012100001} is an apocalyptic number.

It is an amenable number.

222221012100001 is a deficient number, since it is larger than the sum of its proper divisors (91940843171).

222221012100001 is an equidigital number, since it uses as much as digits as its factorization.

222221012100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91940843170.

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

Adding to 222221012100001 its reverse (100001210122222), we get a palindrome (322222222222223).

The spelling of 222221012100001 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, twelve million, one hundred thousand, one".