211323213434 has 4 divisors (see below), whose sum is σ = 316984820154. Its totient is φ = 105661606716.

The previous prime is 211323213433. The next prime is 211323213503. The reversal of 211323213434 is 434312323112.

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., 204769825225 + 6553388209 = 452515^2 + 80953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211323213397 and 211323213406.

It is not an unprimeable number, because it can be changed into a prime (211323213433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52830803357 + ... + 52830803360.

Almost surely, 2^211323213434 is an apocalyptic number.

211323213434 is a deficient number, since it is larger than the sum of its proper divisors (105661606720).

211323213434 is a wasteful number, since it uses less digits than its factorization.

211323213434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105661606719.

The product of its digits is 10368, while the sum is 29.

Adding to 211323213434 its reverse (434312323112), we get a palindrome (645635536546).

The spelling of 211323213434 in words is "two hundred eleven billion, three hundred twenty-three million, two hundred thirteen thousand, four hundred thirty-four".