222002101861 has 2 divisors, whose sum is σ = 222002101862. Its totient is φ = 222002101860.

The previous prime is 222002101799. The next prime is 222002101891. The reversal of 222002101861 is 168101200222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215696153761 + 6305948100 = 464431^2 + 79410^2 .

It is a cyclic number.

It is not a de Polignac number, because 222002101861 - 2³¹ = 219854618213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222002101891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111001050930 + 111001050931.

It is an arithmetic number, because the mean of its divisors is an integer number (111001050931).

Almost surely, 2^222002101861 is an apocalyptic number.

It is an amenable number.

222002101861 is a deficient number, since it is larger than the sum of its proper divisors (1).

222002101861 is an equidigital number, since it uses as much as digits as its factorization.

222002101861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 222002101861 in words is "two hundred twenty-two billion, two million, one hundred one thousand, eight hundred sixty-one".