1032400231220 has 24 divisors (see below), whose sum is σ = 2168814074784. Its totient is φ = 412812742176.

The previous prime is 1032400231211. The next prime is 1032400231231. The reversal of 1032400231220 is 221320042301.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1032400231192 and 1032400231201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9151934 + ... + 9264053.

It is an arithmetic number, because the mean of its divisors is an integer number (90367253116).

Almost surely, 2^{1032400231220} is an apocalyptic number.

1032400231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1032400231220 is an abundant number, since it is smaller than the sum of its proper divisors (1136413843564).

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

1032400231220 is a wasteful number, since it uses less digits than its factorization.

1032400231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18418799 (or 18418797 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1032400231220 its reverse (221320042301), we get a palindrome (1253720273521).

The spelling of 1032400231220 in words is "one trillion, thirty-two billion, four hundred million, two hundred thirty-one thousand, two hundred twenty".