21000222312140 has 48 divisors (see below), whose sum is σ = 44176908115200. Its totient is φ = 8385537327552.

The previous prime is 21000222312119. The next prime is 21000222312149. The reversal of 21000222312140 is 4121322200012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21000222312149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38854271 + ... + 39391049.

It is an arithmetic number, because the mean of its divisors is an integer number (920352252400).

Almost surely, 2^{21000222312140} is an apocalyptic number.

21000222312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000222312140 is an abundant number, since it is smaller than the sum of its proper divisors (23176685803060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000222312140 is a wasteful number, since it uses less digits than its factorization.

21000222312140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540174 (or 540172 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21000222312140 its reverse (4121322200012), we get a palindrome (25121544512152).

The spelling of 21000222312140 in words is "twenty-one trillion, two hundred twenty-two million, three hundred twelve thousand, one hundred forty".