2123511402 has 16 divisors (see below), whose sum is σ = 4470550560. Its totient is φ = 670582512.

The previous prime is 2123511359. The next prime is 2123511413. The reversal of 2123511402 is 2041153212.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9313533 + ... + 9313760.

It is an arithmetic number, because the mean of its divisors is an integer number (279409410).

Almost surely, 2^2123511402 is an apocalyptic number.

2123511402 is an abundant number, since it is smaller than the sum of its proper divisors (2347039158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123511402 is a wasteful number, since it uses less digits than its factorization.

2123511402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18627317.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2123511402 is about 46081.5733455358. The cubic root of 2123511402 is about 1285.3405209175.

Adding to 2123511402 its reverse (2041153212), we get a palindrome (4164664614).

The spelling of 2123511402 in words is "two billion, one hundred twenty-three million, five hundred eleven thousand, four hundred two".