222231231220 has 48 divisors (see below), whose sum is σ = 471699981648. Its totient is φ = 87938841600.

The previous prime is 222231231217. The next prime is 222231231223. The reversal of 222231231220 is 22132132222.

It is an interprime number because it is at equal distance from previous prime (222231231217) and next prime (222231231223).

It can be written as a sum of positive squares in 8 ways, for example, as 9116048484 + 213115182736 = 95478^2 + 461644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222231231191 and 222231231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222231231223) 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, 2404912 + ... + 2495608.

It is an arithmetic number, because the mean of its divisors is an integer number (9827082951).

Almost surely, 2^222231231220 is an apocalyptic number.

222231231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222231231220 is an abundant number, since it is smaller than the sum of its proper divisors (249468750428).

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

222231231220 is a wasteful number, since it uses less digits than its factorization.

222231231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92020 (or 92018 counting only the distinct ones).

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

Adding to 222231231220 its reverse (22132132222), we get a palindrome (244363363442).

The spelling of 222231231220 in words is "two hundred twenty-two billion, two hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty".