100210121221 has 8 divisors (see below), whose sum is σ = 121262667840. Its totient is φ = 80841778368.

The previous prime is 100210121203. The next prime is 100210121257. The reversal of 100210121221 is 122121012001.

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 100210121221 - 2¹⁷ = 100209990149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100210121281) 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, 421050811 + ... + 421051048.

It is an arithmetic number, because the mean of its divisors is an integer number (15157833480).

Almost surely, 2^100210121221 is an apocalyptic number.

It is an amenable number.

100210121221 is a deficient number, since it is larger than the sum of its proper divisors (21052546619).

100210121221 is an equidigital number, since it uses as much as digits as its factorization.

100210121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842101883.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100210121221 its reverse (122121012001), we get a palindrome (222331133222).

The spelling of 100210121221 in words is "one hundred billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".