222001212012001 has 4 divisors (see below), whose sum is σ = 222007669136404. Its totient is φ = 221994754887600.

The previous prime is 222001212011989. The next prime is 222001212012031. The reversal of 222001212012001 is 100210212100222.

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 115660238157025 + 106340973854976 = 10754545^2 + 10312176^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001212012001 - 2¹⁵ = 222001211979233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222001212012031) 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, 3228510630 + ... + 3228579391.

It is an arithmetic number, because the mean of its divisors is an integer number (55501917284101).

Almost surely, 2^{222001212012001} is an apocalyptic number.

It is an amenable number.

222001212012001 is a deficient number, since it is larger than the sum of its proper divisors (6457124403).

222001212012001 is an equidigital number, since it uses as much as digits as its factorization.

222001212012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457124402.

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

Adding to 222001212012001 its reverse (100210212100222), we get a palindrome (322211424112223).

The spelling of 222001212012001 in words is "two hundred twenty-two trillion, one billion, two hundred twelve million, twelve thousand, one".