100401012 has 24 divisors (see below), whose sum is σ = 260299200. Its totient is φ = 33466968.

The previous prime is 100401011. The next prime is 100401023. The reversal of 100401012 is 210104001.

It is a happy number.

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 = 100400985 and 100401003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100401011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464712 + ... + 464927.

It is an arithmetic number, because the mean of its divisors is an integer number (10845800).

Almost surely, 2^100401012 is an apocalyptic number.

100401012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100401012 is an abundant number, since it is smaller than the sum of its proper divisors (159898188).

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

100401012 is a wasteful number, since it uses less digits than its factorization.

100401012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929652 (or 929644 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 100401012 is about 10020.0305388756. The cubic root of 100401012 is about 464.7785001258.

Adding to 100401012 its reverse (210104001), we get a palindrome (310505013).

The spelling of 100401012 in words is "one hundred million, four hundred one thousand, twelve".