1143031431220 has 24 divisors (see below), whose sum is σ = 2743275435264. Its totient is φ = 391896490656.

The previous prime is 1143031431211. The next prime is 1143031431239. The reversal of 1143031431220 is 221341303411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4082254972 + ... + 4082255251.

It is an arithmetic number, because the mean of its divisors is an integer number (114303143136).

Almost surely, 2^{1143031431220} is an apocalyptic number.

1143031431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143031431220 is an abundant number, since it is smaller than the sum of its proper divisors (1600244004044).

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

1143031431220 is a wasteful number, since it uses less digits than its factorization.

1143031431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164510239 (or 8164510237 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1143031431220 its reverse (221341303411), we get a palindrome (1364372734631).

The spelling of 1143031431220 in words is "one trillion, one hundred forty-three billion, thirty-one million, four hundred thirty-one thousand, two hundred twenty".