100102121121021 has 4 divisors (see below), whose sum is σ = 133469494828032. Its totient is φ = 66734747414012.

The previous prime is 100102121120987. The next prime is 100102121121043. The reversal of 100102121121021 is 120121121201001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100102121121021 - 2¹⁰ = 100102121119997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102121121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16683686853501 + ... + 16683686853506.

It is an arithmetic number, because the mean of its divisors is an integer number (33367373707008).

Almost surely, 2^{100102121121021} is an apocalyptic number.

It is an amenable number.

100102121121021 is a deficient number, since it is larger than the sum of its proper divisors (33367373707011).

100102121121021 is an equidigital number, since it uses as much as digits as its factorization.

100102121121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33367373707010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100102121121021 its reverse (120121121201001), we get a palindrome (220223242322022).

The spelling of 100102121121021 in words is "one hundred trillion, one hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".