21885920118212 has 48 divisors (see below), whose sum is σ = 40040081766720. Its totient is φ = 10454118729600.

The previous prime is 21885920118199. The next prime is 21885920118269. The reversal of 21885920118212 is 21281102958812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9116387 + ... + 11264117.

It is an arithmetic number, because the mean of its divisors is an integer number (834168370140).

Almost surely, 2^{21885920118212} is an apocalyptic number.

It is an amenable number.

21885920118212 is a deficient number, since it is larger than the sum of its proper divisors (18154161648508).

21885920118212 is a wasteful number, since it uses less digits than its factorization.

21885920118212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148692 (or 2148690 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 50.

The spelling of 21885920118212 in words is "twenty-one trillion, eight hundred eighty-five billion, nine hundred twenty million, one hundred eighteen thousand, two hundred twelve".