21942698122 has 4 divisors (see below), whose sum is σ = 32914047186. Its totient is φ = 10971349060.

The previous prime is 21942698077. The next prime is 21942698147. The reversal of 21942698122 is 22189624912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21788416881 + 154281241 = 147609^2 + 12421^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5485674529 + ... + 5485674532.

Almost surely, 2^21942698122 is an apocalyptic number.

21942698122 is a deficient number, since it is larger than the sum of its proper divisors (10971349064).

21942698122 is a wasteful number, since it uses less digits than its factorization.

21942698122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10971349063.

The product of its digits is 248832, while the sum is 46.

The spelling of 21942698122 in words is "twenty-one billion, nine hundred forty-two million, six hundred ninety-eight thousand, one hundred twenty-two".