100210012121 has 4 divisors (see below), whose sum is σ = 100930947600. Its totient is φ = 99489076644.

The previous prime is 100210012087. The next prime is 100210012129. The reversal of 100210012121 is 121210012001.

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-100210012121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100210012129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360467531 + ... + 360467808.

It is an arithmetic number, because the mean of its divisors is an integer number (25232736900).

Almost surely, 2^100210012121 is an apocalyptic number.

It is an amenable number.

100210012121 is a deficient number, since it is larger than the sum of its proper divisors (720935479).

100210012121 is an equidigital number, since it uses as much as digits as its factorization.

100210012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720935478.

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

Adding to 100210012121 its reverse (121210012001), we get a palindrome (221420024122).

The spelling of 100210012121 in words is "one hundred billion, two hundred ten million, twelve thousand, one hundred twenty-one".