21222043140 has 48 divisors (see below), whose sum is σ = 59428881792. Its totient is φ = 5658529536.

The previous prime is 21222043097. The next prime is 21222043163. The reversal of 21222043140 is 4134022212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661552 + ... + 692888.

It is an arithmetic number, because the mean of its divisors is an integer number (1238101704).

Almost surely, 2^21222043140 is an apocalyptic number.

21222043140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222043140 is an abundant number, since it is smaller than the sum of its proper divisors (38206838652).

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

21222043140 is a wasteful number, since it uses less digits than its factorization.

21222043140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42636 (or 42634 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21222043140 its reverse (4134022212), we get a palindrome (25356065352).

The spelling of 21222043140 in words is "twenty-one billion, two hundred twenty-two million, forty-three thousand, one hundred forty".