100101212520 has 64 divisors (see below), whose sum is σ = 301154483520. Its totient is φ = 26618025984.

The previous prime is 100101212507. The next prime is 100101212567. The reversal of 100101212520 is 25212101001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100101212520.

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, 1139194 + ... + 1223913.

It is an arithmetic number, because the mean of its divisors is an integer number (4705538805).

Almost surely, 2^100101212520 is an apocalyptic number.

100101212520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100101212520 is an abundant number, since it is smaller than the sum of its proper divisors (201053271000).

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

100101212520 is a wasteful number, since it uses less digits than its factorization.

100101212520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363474 (or 2363470 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 100101212520 its reverse (25212101001), we get a palindrome (125313313521).

The spelling of 100101212520 in words is "one hundred billion, one hundred one million, two hundred twelve thousand, five hundred twenty".