100512221 has 8 divisors (see below), whose sum is σ = 102557664. Its totient is φ = 98472400.

The previous prime is 100512193. The next prime is 100512227. The reversal of 100512221 is 122215001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100512221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100512196 and 100512205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100512227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68546 + ... + 69996.

It is an arithmetic number, because the mean of its divisors is an integer number (12819708).

Almost surely, 2^100512221 is an apocalyptic number.

It is an amenable number.

100512221 is a deficient number, since it is larger than the sum of its proper divisors (2045443).

100512221 is a wasteful number, since it uses less digits than its factorization.

100512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 100512221 is about 10025.5783374327. The cubic root of 100512221 is about 464.9500404953.

Adding to 100512221 its reverse (122215001), we get a palindrome (222727222).

The spelling of 100512221 in words is "one hundred million, five hundred twelve thousand, two hundred twenty-one".