2100143121 has 4 divisors (see below), whose sum is σ = 2800190832. Its totient is φ = 1400095412.

The previous prime is 2100143047. The next prime is 2100143147. The reversal of 2100143121 is 1213410012.

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 2100143121 - 2²² = 2095948817 is a prime.

It is a super-2 number, since 2×2100143121² = 8821202257367241282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2100143121.

It is not an unprimeable number, because it can be changed into a prime (2100143191) 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, 350023851 + ... + 350023856.

It is an arithmetic number, because the mean of its divisors is an integer number (700047708).

Almost surely, 2^2100143121 is an apocalyptic number.

It is an amenable number.

2100143121 is a deficient number, since it is larger than the sum of its proper divisors (700047711).

2100143121 is an equidigital number, since it uses as much as digits as its factorization.

2100143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700047710.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2100143121 is about 45827.3185010862. The cubic root of 2100143121 is about 1280.6082560363.

Adding to 2100143121 its reverse (1213410012), we get a palindrome (3313553133).

The spelling of 2100143121 in words is "two billion, one hundred million, one hundred forty-three thousand, one hundred twenty-one".