1222423431220 has 48 divisors (see below), whose sum is σ = 2733279474240. Its totient is φ = 457635459584.

The previous prime is 1222423431197. The next prime is 1222423431233. The reversal of 1222423431220 is 221343242221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9982054 + ... + 10103773.

It is an arithmetic number, because the mean of its divisors is an integer number (56943322380).

Almost surely, 2^{1222423431220} is an apocalyptic number.

1222423431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222423431220 is an abundant number, since it is smaller than the sum of its proper divisors (1510856043020).

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

1222423431220 is a wasteful number, since it uses less digits than its factorization.

1222423431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20086032 (or 20086030 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1222423431220 its reverse (221343242221), we get a palindrome (1443766673441).

The spelling of 1222423431220 in words is "one trillion, two hundred twenty-two billion, four hundred twenty-three million, four hundred thirty-one thousand, two hundred twenty".