2121154114 has 8 divisors (see below), whose sum is σ = 3185158860. Its totient is φ = 1059434496.

The previous prime is 2121154111. The next prime is 2121154151. The reversal of 2121154114 is 4114511212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2119037089 + 2117025 = 46033^2 + 1455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2121154111) 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, 568959 + ... + 572674.

Almost surely, 2^2121154114 is an apocalyptic number.

2121154114 is a deficient number, since it is larger than the sum of its proper divisors (1064004746).

2121154114 is a wasteful number, since it uses less digits than its factorization.

2121154114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142564.

The product of its digits is 320, while the sum is 22.

The square root of 2121154114 is about 46055.9889048102. The cubic root of 2121154114 is about 1284.8647304202.

Adding to 2121154114 its reverse (4114511212), we get a palindrome (6235665326).

The spelling of 2121154114 in words is "two billion, one hundred twenty-one million, one hundred fifty-four thousand, one hundred fourteen".