20112221140 has 24 divisors (see below), whose sum is σ = 46075270752. Its totient is φ = 7313534880.

The previous prime is 20112221119. The next prime is 20112221141. The reversal of 20112221140 is 4112221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112221141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45709374 + ... + 45709813.

It is an arithmetic number, because the mean of its divisors is an integer number (1919802948).

Almost surely, 2^20112221140 is an apocalyptic number.

20112221140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112221140 is an abundant number, since it is smaller than the sum of its proper divisors (25963049612).

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

20112221140 is a wasteful number, since it uses less digits than its factorization.

20112221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91419207 (or 91419205 counting only the distinct ones).

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

Adding to 20112221140 its reverse (4112221102), we get a palindrome (24224442242).

The spelling of 20112221140 in words is "twenty billion, one hundred twelve million, two hundred twenty-one thousand, one hundred forty".