100121212110221 has 8 divisors (see below), whose sum is σ = 101061977031840. Its totient is φ = 99180851219568.

The previous prime is 100121212110193. The next prime is 100121212110223. The reversal of 100121212110221 is 122011212121001.

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

It is a cyclic number.

It is not a de Polignac number, because 100121212110221 - 2²² = 100121207915917 is a prime.

It is a super-2 number, since 2×100121212110221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100121212110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121212110223) 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, 100509791 + ... + 101501036.

It is an arithmetic number, because the mean of its divisors is an integer number (12632747128980).

Almost surely, 2^{100121212110221} is an apocalyptic number.

It is an amenable number.

100121212110221 is a deficient number, since it is larger than the sum of its proper divisors (940764921619).

100121212110221 is a wasteful number, since it uses less digits than its factorization.

100121212110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202015483.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100121212110221 its reverse (122011212121001), we get a palindrome (222132424231222).

The spelling of 100121212110221 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twenty-one".