212131312202 has 4 divisors (see below), whose sum is σ = 318196968306. Its totient is φ = 106065656100.

The previous prime is 212131312199. The next prime is 212131312223. The reversal of 212131312202 is 202213131212.

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., 116328062761 + 95803249441 = 341069^2 + 309521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53032828049 + ... + 53032828052.

Almost surely, 2^212131312202 is an apocalyptic number.

212131312202 is a deficient number, since it is larger than the sum of its proper divisors (106065656104).

212131312202 is a wasteful number, since it uses less digits than its factorization.

212131312202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106065656103.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212131312202 its reverse (202213131212), we get a palindrome (414344443414).

The spelling of 212131312202 in words is "two hundred twelve billion, one hundred thirty-one million, three hundred twelve thousand, two hundred two".