2135121263 has 16 divisors (see below), whose sum is σ = 2350158624. Its totient is φ = 1923653760.

The previous prime is 2135121253. The next prime is 2135121293. The reversal of 2135121263 is 3621215312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2135121263 - 2¹² = 2135117167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135121203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598481 + ... + 602037.

It is an arithmetic number, because the mean of its divisors is an integer number (146884914).

Almost surely, 2^2135121263 is an apocalyptic number.

2135121263 is a deficient number, since it is larger than the sum of its proper divisors (215037361).

2135121263 is a wasteful number, since it uses less digits than its factorization.

2135121263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042.

The product of its digits is 2160, while the sum is 26.

The square root of 2135121263 is about 46207.3723879642. The cubic root of 2135121263 is about 1287.6787097017.

Adding to 2135121263 its reverse (3621215312), we get a palindrome (5756336575).

The spelling of 2135121263 in words is "two billion, one hundred thirty-five million, one hundred twenty-one thousand, two hundred sixty-three".