212116402 has 4 divisors (see below), whose sum is σ = 318174606. Its totient is φ = 106058200.

The previous prime is 212116397. The next prime is 212116423. The reversal of 212116402 is 204611212.

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., 158986881 + 53129521 = 12609^2 + 7289^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212116402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53029099 + ... + 53029102.

Almost surely, 2^212116402 is an apocalyptic number.

212116402 is a deficient number, since it is larger than the sum of its proper divisors (106058204).

212116402 is a wasteful number, since it uses less digits than its factorization.

212116402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106058203.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 212116402 is about 14564.2164911127. The cubic root of 212116402 is about 596.3823069274.

Adding to 212116402 its reverse (204611212), we get a palindrome (416727614).

The spelling of 212116402 in words is "two hundred twelve million, one hundred sixteen thousand, four hundred two".