22121223938 has 8 divisors (see below), whose sum is σ = 36198366480. Its totient is φ = 10055101780.

The previous prime is 22121223937. The next prime is 22121223959. The reversal of 22121223938 is 83932212122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22121223898 and 22121223907.

It is not an unprimeable number, because it can be changed into a prime (22121223931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502755068 + ... + 502755111.

It is an arithmetic number, because the mean of its divisors is an integer number (4524795810).

Almost surely, 2^22121223938 is an apocalyptic number.

22121223938 is a deficient number, since it is larger than the sum of its proper divisors (14077142542).

22121223938 is a wasteful number, since it uses less digits than its factorization.

22121223938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005510192.

The product of its digits is 20736, while the sum is 35.

The spelling of 22121223938 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-three thousand, nine hundred thirty-eight".