100311312420 has 72 divisors (see below), whose sum is σ = 331939258560. Its totient is φ = 24317893440.

The previous prime is 100311312403. The next prime is 100311312427. The reversal of 100311312420 is 24213113001.

100311312420 is a `hidden beast` number, since 1 + 0 + 0 + 311 + 312 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 100311312393 and 100311312402.

It is not an unprimeable number, because it can be changed into a prime (100311312427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25329160 + ... + 25333119.

It is an arithmetic number, because the mean of its divisors is an integer number (4610267480).

Almost surely, 2^100311312420 is an apocalyptic number.

100311312420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100311312420 is an abundant number, since it is smaller than the sum of its proper divisors (231627946140).

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

100311312420 is a wasteful number, since it uses less digits than its factorization.

100311312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50662305 (or 50662300 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 100311312420 its reverse (24213113001), we get a palindrome (124524425421).

The spelling of 100311312420 in words is "one hundred billion, three hundred eleven million, three hundred twelve thousand, four hundred twenty".