222129019961 has 2 divisors, whose sum is σ = 222129019962. Its totient is φ = 222129019960.

The previous prime is 222129019909. The next prime is 222129020027. The reversal of 222129019961 is 169910921222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221464360000 + 664659961 = 470600^2 + 25781^2 .

It is a cyclic number.

It is not a de Polignac number, because 222129019961 - 2⁶ = 222129019897 is a prime.

It is not a weakly prime, because it can be changed into another prime (222129019061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111064509980 + 111064509981.

It is an arithmetic number, because the mean of its divisors is an integer number (111064509981).

Almost surely, 2^222129019961 is an apocalyptic number.

It is an amenable number.

222129019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

222129019961 is an equidigital number, since it uses as much as digits as its factorization.

222129019961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 222129019961 in words is "two hundred twenty-two billion, one hundred twenty-nine million, nineteen thousand, nine hundred sixty-one".