100211821215 has 48 divisors (see below), whose sum is σ = 182850998400. Its totient is φ = 46475007040.

The previous prime is 100211821181. The next prime is 100211821243. The reversal of 100211821215 is 512128112001.

It is not a de Polignac number, because 100211821215 - 2⁸ = 100211820959 is a prime.

It is a super-2 number, since 2×100211821215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 486765 + ... + 661334.

It is an arithmetic number, because the mean of its divisors is an integer number (3809395800).

Almost surely, 2^100211821215 is an apocalyptic number.

100211821215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100211821215 is a deficient number, since it is larger than the sum of its proper divisors (82639177185).

100211821215 is a wasteful number, since it uses less digits than its factorization.

100211821215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148164 (or 1148141 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 24.

Adding to 100211821215 its reverse (512128112001), we get a palindrome (612339933216).

The spelling of 100211821215 in words is "one hundred billion, two hundred eleven million, eight hundred twenty-one thousand, two hundred fifteen".