22121121101985 has 128 divisors (see below), whose sum is σ = 39731747328000. Its totient is φ = 11677101004800.

The previous prime is 22121121101983. The next prime is 22121121102007. The reversal of 22121121101985 is 58910112112122.

It is a happy number.

22121121101985 is a `hidden beast` number, since 221 + 211 + 21 + 10 + 198 + 5 = 666.

It is not a de Polignac number, because 22121121101985 - 2¹ = 22121121101983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121121101983) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4787082975 + ... + 4787087595.

It is an arithmetic number, because the mean of its divisors is an integer number (310404276000).

Almost surely, 2^{22121121101985} is an apocalyptic number.

It is an amenable number.

22121121101985 is a deficient number, since it is larger than the sum of its proper divisors (17610626226015).

22121121101985 is a wasteful number, since it uses less digits than its factorization.

22121121101985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The spelling of 22121121101985 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred one thousand, nine hundred eighty-five".