222121100020201 has 2 divisors, whose sum is σ = 222121100020202. Its totient is φ = 222121100020200.

The previous prime is 222121100020177. The next prime is 222121100020243. The reversal of 222121100020201 is 102020001121222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220868670445801 + 1252429574400 = 14861651^2 + 1119120^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121100020201 - 2²⁷ = 222120965802473 is a prime.

It is not a weakly prime, because it can be changed into another prime (222121100020271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060550010100 + 111060550010101.

It is an arithmetic number, because the mean of its divisors is an integer number (111060550010101).

Almost surely, 2^{222121100020201} is an apocalyptic number.

It is an amenable number.

222121100020201 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121100020201 is an equidigital number, since it uses as much as digits as its factorization.

222121100020201 is an evil number, because the sum of its binary digits is even.

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

Adding to 222121100020201 its reverse (102020001121222), we get a palindrome (324141101141423).

The spelling of 222121100020201 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred million, twenty thousand, two hundred one".