210100110121 has 4 divisors (see below), whose sum is σ = 229200120144. Its totient is φ = 191000100100.

The previous prime is 210100110091. The next prime is 210100110167. The reversal of 210100110121 is 121011001012.

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 210100110121 - 2¹⁹ = 210099585833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100110098 and 210100110107.

It is not an unprimeable number, because it can be changed into a prime (210100110191) 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, 9550004995 + ... + 9550005016.

It is an arithmetic number, because the mean of its divisors is an integer number (57300030036).

Almost surely, 2^210100110121 is an apocalyptic number.

It is an amenable number.

210100110121 is a deficient number, since it is larger than the sum of its proper divisors (19100010023).

210100110121 is a wasteful number, since it uses less digits than its factorization.

210100110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100010022.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 210100110121 its reverse (121011001012), we get a palindrome (331111111133).

The spelling of 210100110121 in words is "two hundred ten billion, one hundred million, one hundred ten thousand, one hundred twenty-one".