22131234220 has 48 divisors (see below), whose sum is σ = 46774506240. Its totient is φ = 8795643584.

The previous prime is 22131234193. The next prime is 22131234227. The reversal of 22131234220 is 2243213122.

It is a junction number, because it is equal to n+sod(n) for n = 22131234191 and 22131234200.

It is not an unprimeable number, because it can be changed into a prime (22131234227) 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, 6610587 + ... + 6613933.

It is an arithmetic number, because the mean of its divisors is an integer number (974468880).

Almost surely, 2^22131234220 is an apocalyptic number.

22131234220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22131234220 is an abundant number, since it is smaller than the sum of its proper divisors (24643272020).

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

22131234220 is a wasteful number, since it uses less digits than its factorization.

22131234220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382 (or 5380 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 22131234220 its reverse (2243213122), we get a palindrome (24374447342).

The spelling of 22131234220 in words is "twenty-two billion, one hundred thirty-one million, two hundred thirty-four thousand, two hundred twenty".