100311012 has 18 divisors (see below), whose sum is σ = 253564038. Its totient is φ = 33436992.

The previous prime is 100311007. The next prime is 100311017. The reversal of 100311012 is 210113001.

It is an interprime number because it is at equal distance from previous prime (100311007) and next prime (100311017).

It can be written as a sum of positive squares in only one way, i.e., 72999936 + 27311076 = 8544^2 + 5226^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100310985 and 100311003.

It is not an unprimeable number, because it can be changed into a prime (100311017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1393173 + ... + 1393244.

It is an arithmetic number, because the mean of its divisors is an integer number (14086891).

Almost surely, 2^100311012 is an apocalyptic number.

100311012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100311012 is an abundant number, since it is smaller than the sum of its proper divisors (153253026).

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

100311012 is a wasteful number, since it uses less digits than its factorization.

100311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786427 (or 2786422 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 100311012 is about 10015.5385277078. The cubic root of 100311012 is about 464.6395819705.

Adding to 100311012 its reverse (210113001), we get a palindrome (310424013).

The spelling of 100311012 in words is "one hundred million, three hundred eleven thousand, twelve".