210040203121 has 4 divisors (see below), whose sum is σ = 240045946432. Its totient is φ = 180034459812.

The previous prime is 210040203097. The next prime is 210040203133. The reversal of 210040203121 is 121302040012.

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 210040203121 - 2⁹ = 210040202609 is a prime.

It is a super-2 number, since 2×210040203121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210040203095 and 210040203104.

It is not an unprimeable number, because it can be changed into a prime (210040203221) 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, 15002871645 + ... + 15002871658.

It is an arithmetic number, because the mean of its divisors is an integer number (60011486608).

Almost surely, 2^210040203121 is an apocalyptic number.

It is an amenable number.

210040203121 is a deficient number, since it is larger than the sum of its proper divisors (30005743311).

210040203121 is an equidigital number, since it uses as much as digits as its factorization.

210040203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30005743310.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210040203121 its reverse (121302040012), we get a palindrome (331342243133).

The spelling of 210040203121 in words is "two hundred ten billion, forty million, two hundred three thousand, one hundred twenty-one".