194222642121 has 12 divisors (see below), whose sum is σ = 281556613572. Its totient is φ = 129014316576.

The previous prime is 194222641967. The next prime is 194222642129. The reversal of 194222642121 is 121246222491.

194222642121 is a `hidden beast` number, since 1 + 9 + 4 + 2 + 2 + 2 + 642 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64864449225 + 129358192896 = 254685^2 + 359664^2 .

It is a de Polignac number, because none of the positive numbers 2^k-194222642121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194222642129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38951106 + ... + 38956091.

It is an arithmetic number, because the mean of its divisors is an integer number (23463051131).

Almost surely, 2^194222642121 is an apocalyptic number.

It is an amenable number.

194222642121 is a deficient number, since it is larger than the sum of its proper divisors (87333971451).

194222642121 is a wasteful number, since it uses less digits than its factorization.

194222642121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77907480 (or 77907477 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The spelling of 194222642121 in words is "one hundred ninety-four billion, two hundred twenty-two million, six hundred forty-two thousand, one hundred twenty-one".