100155012 has 12 divisors (see below), whose sum is σ = 233695056. Its totient is φ = 33385000.

The previous prime is 100154987. The next prime is 100155031. The reversal of 100155012 is 210551001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 100154982 and 100155000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4173114 + ... + 4173137.

It is an arithmetic number, because the mean of its divisors is an integer number (19474588).

Almost surely, 2^100155012 is an apocalyptic number.

100155012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100155012 is an abundant number, since it is smaller than the sum of its proper divisors (133540044).

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

100155012 is a wasteful number, since it uses less digits than its factorization.

100155012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346258 (or 8346256 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 100155012 is about 10007.7475987357. The cubic root of 100155012 is about 464.3985935335.

The spelling of 100155012 in words is "one hundred million, one hundred fifty-five thousand, twelve".