100102210121 has 4 divisors (see below), whose sum is σ = 103554010500. Its totient is φ = 96650409744.

The previous prime is 100102210099. The next prime is 100102210127. The reversal of 100102210121 is 121012201001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60356205625 + 39746004496 = 245675^2 + 199364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100102210121 is a prime.

It is a super-2 number, since 2×100102210121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100102210127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725900146 + ... + 1725900203.

It is an arithmetic number, because the mean of its divisors is an integer number (25888502625).

Almost surely, 2^100102210121 is an apocalyptic number.

It is an amenable number.

100102210121 is a deficient number, since it is larger than the sum of its proper divisors (3451800379).

100102210121 is an equidigital number, since it uses as much as digits as its factorization.

100102210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451800378.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100102210121 its reverse (121012201001), we get a palindrome (221114411122).

The spelling of 100102210121 in words is "one hundred billion, one hundred two million, two hundred ten thousand, one hundred twenty-one".