2123502011 has 4 divisors (see below), whose sum is σ = 2248413912. Its totient is φ = 1998590112.

The previous prime is 2123502001. The next prime is 2123502013. The reversal of 2123502011 is 1102053212.

It is a happy number.

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-2123502011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 124911883 = 2123502011 / (2 + 1 + 2 + 3 + 5 + 0 + 2 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123502013) 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 3 ways as a sum of consecutive naturals, for example, 62455925 + ... + 62455958.

It is an arithmetic number, because the mean of its divisors is an integer number (562103478).

Almost surely, 2^2123502011 is an apocalyptic number.

2123502011 is a deficient number, since it is larger than the sum of its proper divisors (124911901).

2123502011 is a wasteful number, since it uses less digits than its factorization.

2123502011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124911900.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2123502011 is about 46081.4714500308. The cubic root of 2123502011 is about 1285.3386261548.

Adding to 2123502011 its reverse (1102053212), we get a palindrome (3225555223).

The spelling of 2123502011 in words is "two billion, one hundred twenty-three million, five hundred two thousand, eleven".