21222011140 has 48 divisors (see below), whose sum is σ = 49118961024. Its totient is φ = 7637529600.

The previous prime is 21222011119. The next prime is 21222011141. The reversal of 21222011140 is 4111022212.

It is not an unprimeable number, because it can be changed into a prime (21222011141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475896 + ... + 518575.

It is an arithmetic number, because the mean of its divisors is an integer number (1023311688).

Almost surely, 2^21222011140 is an apocalyptic number.

21222011140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222011140 is an abundant number, since it is smaller than the sum of its proper divisors (27896949884).

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

21222011140 is a wasteful number, since it uses less digits than its factorization.

21222011140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994588 (or 994586 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222011140 its reverse (4111022212), we get a palindrome (25333033352).

The spelling of 21222011140 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred forty".