2131121203 has 2 divisors, whose sum is σ = 2131121204. Its totient is φ = 2131121202.

The previous prime is 2131121183. The next prime is 2131121221. The reversal of 2131121203 is 3021211312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131121203 - 2¹⁷ = 2130990131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131127203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065560601 + 1065560602.

It is an arithmetic number, because the mean of its divisors is an integer number (1065560602).

Almost surely, 2^2131121203 is an apocalyptic number.

2131121203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131121203 is an equidigital number, since it uses as much as digits as its factorization.

2131121203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2131121203 is about 46164.0683107544. The cubic root of 2131121203 is about 1286.8740696814.

Adding to 2131121203 its reverse (3021211312), we get a palindrome (5152332515).

The spelling of 2131121203 in words is "two billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred three".