1223031231220 has 24 divisors (see below), whose sum is σ = 2568389451264. Its totient is φ = 489207946656.

The previous prime is 1223031231203. The next prime is 1223031231223. The reversal of 1223031231220 is 221321303221.

It is a super-3 number, since 3×1223031231220³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223031231191 and 1223031231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223031231223) 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, 2672457 + ... + 3096463.

It is an arithmetic number, because the mean of its divisors is an integer number (107016227136).

Almost surely, 2^{1223031231220} is an apocalyptic number.

1223031231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223031231220 is an abundant number, since it is smaller than the sum of its proper divisors (1345358220044).

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

1223031231220 is a wasteful number, since it uses less digits than its factorization.

1223031231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568239 (or 568237 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1223031231220 its reverse (221321303221), we get a palindrome (1444352534441).

The spelling of 1223031231220 in words is "one trillion, two hundred twenty-three billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty".