22121618477 has 8 divisors (see below), whose sum is σ = 26381060736. Its totient is φ = 18136978992.

The previous prime is 22121618419. The next prime is 22121618521. The reversal of 22121618477 is 77481612122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22121618477 - 2⁸ = 22121618221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121618977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68700518 + ... + 68700839.

It is an arithmetic number, because the mean of its divisors is an integer number (3297632592).

Almost surely, 2^22121618477 is an apocalyptic number.

It is an amenable number.

22121618477 is a deficient number, since it is larger than the sum of its proper divisors (4259442259).

22121618477 is a wasteful number, since it uses less digits than its factorization.

22121618477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137401387.

The product of its digits is 75264, while the sum is 41.

The spelling of 22121618477 in words is "twenty-two billion, one hundred twenty-one million, six hundred eighteen thousand, four hundred seventy-seven".