22121554898 has 4 divisors (see below), whose sum is σ = 33182332350. Its totient is φ = 11060777448.

The previous prime is 22121554891. The next prime is 22121554909. The reversal of 22121554898 is 89845512122.

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., 11204857609 + 10916697289 = 105853^2 + 104483^2 .

It is a super-2 number, since 2×22121554898² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121554891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530388723 + ... + 5530388726.

Almost surely, 2^22121554898 is an apocalyptic number.

22121554898 is a deficient number, since it is larger than the sum of its proper divisors (11060777452).

22121554898 is a wasteful number, since it uses less digits than its factorization.

22121554898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060777451.

The product of its digits is 460800, while the sum is 47.

The spelling of 22121554898 in words is "twenty-two billion, one hundred twenty-one million, five hundred fifty-four thousand, eight hundred ninety-eight".