2122400002 has 4 divisors (see below), whose sum is σ = 3183600006. Its totient is φ = 1061200000.

The previous prime is 2122399991. The next prime is 2122400053. The reversal of 2122400002 is 2000042212.

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

It can be written as a sum of positive squares in only one way, i.e., 1065434881 + 1056965121 = 32641^2 + 32511^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530599999 + ... + 530600002.

Almost surely, 2^2122400002 is an apocalyptic number.

2122400002 is a deficient number, since it is larger than the sum of its proper divisors (1061200004).

2122400002 is a wasteful number, since it uses less digits than its factorization.

2122400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061200003.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2122400002 is about 46069.5127171973. The cubic root of 2122400002 is about 1285.1162419636.

Adding to 2122400002 its reverse (2000042212), we get a palindrome (4122442214).

The spelling of 2122400002 in words is "two billion, one hundred twenty-two million, four hundred thousand, two".