2135254121 has 16 divisors (see below), whose sum is σ = 2866915968. Its totient is φ = 1535846400.

The previous prime is 2135254109. The next prime is 2135254123. The reversal of 2135254121 is 1214525312.

It is not a de Polignac number, because 2135254121 - 2¹⁴ = 2135237737 is a prime.

It is a super-2 number, since 2×2135254121² = 9118620322494965282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2135254123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065560 + ... + 1067561.

It is an arithmetic number, because the mean of its divisors is an integer number (179182248).

Almost surely, 2^2135254121 is an apocalyptic number.

It is an amenable number.

2135254121 is a deficient number, since it is larger than the sum of its proper divisors (731661847).

2135254121 is a wasteful number, since it uses less digits than its factorization.

2135254121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133152.

The product of its digits is 2400, while the sum is 26.

The square root of 2135254121 is about 46208.8099933335. The cubic root of 2135254121 is about 1287.7054177663.

Adding to 2135254121 its reverse (1214525312), we get a palindrome (3349779433).

The spelling of 2135254121 in words is "two billion, one hundred thirty-five million, two hundred fifty-four thousand, one hundred twenty-one".