212133031442 has 4 divisors (see below), whose sum is σ = 318199547166. Its totient is φ = 106066515720.

The previous prime is 212133031441. The next prime is 212133031469. The reversal of 212133031442 is 244130331212.

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., 196843956241 + 15289075201 = 443671^2 + 123649^2 .

It is not an unprimeable number, because it can be changed into a prime (212133031441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53033257859 + ... + 53033257862.

Almost surely, 2^212133031442 is an apocalyptic number.

212133031442 is a deficient number, since it is larger than the sum of its proper divisors (106066515724).

212133031442 is a wasteful number, since it uses less digits than its factorization.

212133031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106066515723.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 212133031442 its reverse (244130331212), we get a palindrome (456263362654).

The spelling of 212133031442 in words is "two hundred twelve billion, one hundred thirty-three million, thirty-one thousand, four hundred forty-two".