222121220222201 has 12 divisors (see below), whose sum is σ = 236815050283392. Its totient is φ = 207943269947688.

The previous prime is 222121220222197. The next prime is 222121220222243. The reversal of 222121220222201 is 102222022121222.

It is not a de Polignac number, because 222121220222201 - 2² = 222121220222197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (222121220224201) 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, 2185880465 + ... + 2185982078.

It is an arithmetic number, because the mean of its divisors is an integer number (19734587523616).

Almost surely, 2^{222121220222201} is an apocalyptic number.

It is an amenable number.

222121220222201 is a deficient number, since it is larger than the sum of its proper divisors (14693830061191).

222121220222201 is an equidigital number, since it uses as much as digits as its factorization.

222121220222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371862660 (or 4371862613 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222121220222201 its reverse (102222022121222), we get a palindrome (324343242343423).

The spelling of 222121220222201 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred one".