100021102121 has 4 divisors (see below), whose sum is σ = 100293639552. Its totient is φ = 99748564692.

The previous prime is 100021102061. The next prime is 100021102123. The reversal of 100021102121 is 121201120001.

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 a de Polignac number, because none of the positive numbers 2^k-100021102121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021102123) 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 3 ways as a sum of consecutive naturals, for example, 136268165 + ... + 136268898.

It is an arithmetic number, because the mean of its divisors is an integer number (25073409888).

Almost surely, 2^100021102121 is an apocalyptic number.

It is an amenable number.

100021102121 is a deficient number, since it is larger than the sum of its proper divisors (272537431).

100021102121 is an equidigital number, since it uses as much as digits as its factorization.

100021102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272537430.

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

Adding to 100021102121 its reverse (121201120001), we get a palindrome (221222222122).

The spelling of 100021102121 in words is "one hundred billion, twenty-one million, one hundred two thousand, one hundred twenty-one".