212120402 has 16 divisors (see below), whose sum is σ = 346052952. Its totient is φ = 96931200.

The previous prime is 212120401. The next prime is 212120411. The reversal of 212120402 is 204021212.

It can be written as a sum of positive squares in 4 ways, for example, as 211382521 + 737881 = 14539^2 + 859^2 .

It is not an unprimeable number, because it can be changed into a prime (212120401) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 37763 + ... + 43014.

Almost surely, 2^212120402 is an apocalyptic number.

212120402 is a deficient number, since it is larger than the sum of its proper divisors (133932550).

212120402 is a wasteful number, since it uses less digits than its factorization.

212120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80893.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 212120402 is about 14564.3538133348. The cubic root of 212120402 is about 596.3860556776.

Adding to 212120402 its reverse (204021212), we get a palindrome (416141614).

The spelling of 212120402 in words is "two hundred twelve million, one hundred twenty thousand, four hundred two".