222100201261 has 2 divisors, whose sum is σ = 222100201262. Its totient is φ = 222100201260.

The previous prime is 222100201207. The next prime is 222100201319. The reversal of 222100201261 is 162102001222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154445070025 + 67655131236 = 392995^2 + 260106^2 .

It is a cyclic number.

It is not a de Polignac number, because 222100201261 - 2¹³ = 222100193069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222100201061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111050100630 + 111050100631.

It is an arithmetic number, because the mean of its divisors is an integer number (111050100631).

Almost surely, 2^222100201261 is an apocalyptic number.

It is an amenable number.

222100201261 is a deficient number, since it is larger than the sum of its proper divisors (1).

222100201261 is an equidigital number, since it uses as much as digits as its factorization.

222100201261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222100201261 its reverse (162102001222), we get a palindrome (384202202483).

The spelling of 222100201261 in words is "two hundred twenty-two billion, one hundred million, two hundred one thousand, two hundred sixty-one".