203210100121 has 4 divisors (see below), whose sum is σ = 232240114432. Its totient is φ = 174180085812.

The previous prime is 203210100101. The next prime is 203210100139. The reversal of 203210100121 is 121001012302.

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 203210100121 - 2³³ = 194620165529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203210100101) 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, 14515007145 + ... + 14515007158.

It is an arithmetic number, because the mean of its divisors is an integer number (58060028608).

Almost surely, 2^203210100121 is an apocalyptic number.

It is an amenable number.

203210100121 is a deficient number, since it is larger than the sum of its proper divisors (29030014311).

203210100121 is an equidigital number, since it uses as much as digits as its factorization.

203210100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29030014310.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 203210100121 its reverse (121001012302), we get a palindrome (324211112423).

The spelling of 203210100121 in words is "two hundred three billion, two hundred ten million, one hundred thousand, one hundred twenty-one".