2104203121 has 2 divisors, whose sum is σ = 2104203122. Its totient is φ = 2104203120.

The previous prime is 2104203103. The next prime is 2104203131. The reversal of 2104203121 is 1213024012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1992372496 + 111830625 = 44636^2 + 10575^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104203121 - 2¹⁷ = 2104072049 is a prime.

It is a super-2 number, since 2×2104203121² = 8855341548852281282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2104203095 and 2104203104.

It is not a weakly prime, because it can be changed into another prime (2104203131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052101560 + 1052101561.

It is an arithmetic number, because the mean of its divisors is an integer number (1052101561).

Almost surely, 2^2104203121 is an apocalyptic number.

It is an amenable number.

2104203121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104203121 is an equidigital number, since it uses as much as digits as its factorization.

2104203121 is an evil number, because the sum of its binary digits is even.

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

The square root of 2104203121 is about 45871.5938354010. The cubic root of 2104203121 is about 1281.4329494662.

Adding to 2104203121 its reverse (1213024012), we get a palindrome (3317227133).

The spelling of 2104203121 in words is "two billion, one hundred four million, two hundred three thousand, one hundred twenty-one".