212023240402 has 4 divisors (see below), whose sum is σ = 318034860606. Its totient is φ = 106011620200.

The previous prime is 212023240399. The next prime is 212023240421. The reversal of 212023240402 is 204042320212.

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., 112943717041 + 99079523361 = 336071^2 + 314769^2 .

It is a Smith number, since the sum of its digits (22) 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 polite number, since it can be written as a sum of consecutive naturals, namely, 53005810099 + ... + 53005810102.

Almost surely, 2^212023240402 is an apocalyptic number.

212023240402 is a deficient number, since it is larger than the sum of its proper divisors (106011620204).

212023240402 is a wasteful number, since it uses less digits than its factorization.

212023240402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106011620203.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 212023240402 its reverse (204042320212), we get a palindrome (416065560614).

The spelling of 212023240402 in words is "two hundred twelve billion, twenty-three million, two hundred forty thousand, four hundred two".