100031231430020 has 48 divisors (see below), whose sum is σ = 229438890273600. Its totient is φ = 36331115022720.

The previous prime is 100031231430019. The next prime is 100031231430049. The reversal of 100031231430020 is 20034132130001.

It is a super-2 number, since 2×100031231430020² (a number of 29 digits) contains 22 as substring.

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 = 100031231429974 and 100031231430001.

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, 274056110 + ... + 274420869.

It is an arithmetic number, because the mean of its divisors is an integer number (4779976880700).

Almost surely, 2^{100031231430020} is an apocalyptic number.

100031231430020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031231430020 is an abundant number, since it is smaller than the sum of its proper divisors (129407658843580).

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

100031231430020 is a wasteful number, since it uses less digits than its factorization.

100031231430020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548477828 (or 548477826 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 100031231430020 its reverse (20034132130001), we get a palindrome (120065363560021).

The spelling of 100031231430020 in words is "one hundred trillion, thirty-one billion, two hundred thirty-one million, four hundred thirty thousand, twenty".