222131212209 has 24 divisors (see below), whose sum is σ = 329002346400. Its totient is φ = 144373287168.

The previous prime is 222131212207. The next prime is 222131212229. The reversal of 222131212209 is 902212131222.

222131212209 is a `hidden beast` number, since 2 + 221 + 312 + 122 + 0 + 9 = 666.

It is not a de Polignac number, because 222131212209 - 2¹ = 222131212207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222131212207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1840359 + ... + 1957340.

It is an arithmetic number, because the mean of its divisors is an integer number (13708431100).

Almost surely, 2^222131212209 is an apocalyptic number.

It is an amenable number.

222131212209 is a deficient number, since it is larger than the sum of its proper divisors (106871134191).

222131212209 is a wasteful number, since it uses less digits than its factorization.

222131212209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797869 (or 3797866 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 222131212209 in words is "two hundred twenty-two billion, one hundred thirty-one million, two hundred twelve thousand, two hundred nine".