2121023203133 has 4 divisors (see below), whose sum is σ = 2142889421820. Its totient is φ = 2099156984448.

The previous prime is 2121023203099. The next prime is 2121023203177. The reversal of 2121023203133 is 3313023201212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1717090502884 + 403932700249 = 1310378^2 + 635557^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121023203133 - 2⁸ = 2121023202877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121023203099 and 2121023203108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121023403133) 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, 10933109198 + ... + 10933109391.

It is an arithmetic number, because the mean of its divisors is an integer number (535722355455).

Almost surely, 2^{2121023203133} is an apocalyptic number.

It is an amenable number.

2121023203133 is a deficient number, since it is larger than the sum of its proper divisors (21866218687).

2121023203133 is an equidigital number, since it uses as much as digits as its factorization.

2121023203133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866218686.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2121023203133 its reverse (3313023201212), we get a palindrome (5434046404345).

The spelling of 2121023203133 in words is "two trillion, one hundred twenty-one billion, twenty-three million, two hundred three thousand, one hundred thirty-three".