2151130123 has 4 divisors (see below), whose sum is σ = 2152494040. Its totient is φ = 2149766208.

The previous prime is 2151130117. The next prime is 2151130127. The reversal of 2151130123 is 3210311512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151130123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2151130123.

It is not an unprimeable number, because it can be changed into a prime (2151130127) 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, 679590 + ... + 682747.

It is an arithmetic number, because the mean of its divisors is an integer number (538123510).

Almost surely, 2^2151130123 is an apocalyptic number.

2151130123 is a deficient number, since it is larger than the sum of its proper divisors (1363917).

2151130123 is a wasteful number, since it uses less digits than its factorization.

2151130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363916.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2151130123 is about 46380.2773061999. The cubic root of 2151130123 is about 1290.8889818081. Note that the first 3 decimals are identical.

Adding to 2151130123 its reverse (3210311512), we get a palindrome (5361441635).

The spelling of 2151130123 in words is "two billion, one hundred fifty-one million, one hundred thirty thousand, one hundred twenty-three".