2151135121 has 4 divisors (see below), whose sum is σ = 2172020032. Its totient is φ = 2130250212.

The previous prime is 2151135109. The next prime is 2151135127. The reversal of 2151135121 is 1215311512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2151135121 - 2¹¹ = 2151133073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151135092 and 2151135101.

It is not an unprimeable number, because it can be changed into a prime (2151135127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10442301 + ... + 10442506.

It is an arithmetic number, because the mean of its divisors is an integer number (543005008).

Almost surely, 2^2151135121 is an apocalyptic number.

It is an amenable number.

2151135121 is a deficient number, since it is larger than the sum of its proper divisors (20884911).

2151135121 is a wasteful number, since it uses less digits than its factorization.

2151135121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884910.

The product of its digits is 300, while the sum is 22.

The square root of 2151135121 is about 46380.3311868296. The cubic root of 2151135121 is about 1290.8899815706.

Adding to 2151135121 its reverse (1215311512), we get a palindrome (3366446633).

The spelling of 2151135121 in words is "two billion, one hundred fifty-one million, one hundred thirty-five thousand, one hundred twenty-one".