199422758421 has 6 divisors (see below), whose sum is σ = 288055095510. Its totient is φ = 132948505608.

The previous prime is 199422758393. The next prime is 199422758441. The reversal of 199422758421 is 124857224991.

199422758421 is a `hidden beast` number, since 19 + 9 + 4 + 2 + 27 + 584 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 193859687025 + 5563071396 = 440295^2 + 74586^2 .

It is not a de Polignac number, because 199422758421 - 2⁹ = 199422757909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199422758441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11079042126 + ... + 11079042143.

It is an arithmetic number, because the mean of its divisors is an integer number (48009182585).

Almost surely, 2^199422758421 is an apocalyptic number.

It is an amenable number.

199422758421 is a deficient number, since it is larger than the sum of its proper divisors (88632337089).

199422758421 is a wasteful number, since it uses less digits than its factorization.

199422758421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22158084275 (or 22158084272 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 199422758421 in words is "one hundred ninety-nine billion, four hundred twenty-two million, seven hundred fifty-eight thousand, four hundred twenty-one".