2135121253 has 2 divisors, whose sum is σ = 2135121254. Its totient is φ = 2135121252.

The previous prime is 2135121251. The next prime is 2135121293. The reversal of 2135121253 is 3521215312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1577122369 + 557998884 = 39713^2 + 23622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135121253 - 2¹ = 2135121251 is a prime.

Together with 2135121251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067560626 + 1067560627.

It is an arithmetic number, because the mean of its divisors is an integer number (1067560627).

Almost surely, 2^2135121253 is an apocalyptic number.

It is an amenable number.

2135121253 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135121253 is an equidigital number, since it uses as much as digits as its factorization.

2135121253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 2135121253 is about 46207.3722797564. The cubic root of 2135121253 is about 1287.6787076914.

Adding to 2135121253 its reverse (3521215312), we get a palindrome (5656336565).

The spelling of 2135121253 in words is "two billion, one hundred thirty-five million, one hundred twenty-one thousand, two hundred fifty-three".