210101002121 has 4 divisors (see below), whose sum is σ = 210117507600. Its totient is φ = 210084496644.

The previous prime is 210101002093. The next prime is 210101002141. The reversal of 210101002121 is 121200101012.

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-210101002121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210101002141) 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, 8233631 + ... + 8259108.

It is an arithmetic number, because the mean of its divisors is an integer number (52529376900).

Almost surely, 2^210101002121 is an apocalyptic number.

It is an amenable number.

210101002121 is a deficient number, since it is larger than the sum of its proper divisors (16505479).

210101002121 is a wasteful number, since it uses less digits than its factorization.

210101002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505478.

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

Adding to 210101002121 its reverse (121200101012), we get a palindrome (331301103133).

The spelling of 210101002121 in words is "two hundred ten billion, one hundred one million, two thousand, one hundred twenty-one".