211021234 has 4 divisors (see below), whose sum is σ = 316531854. Its totient is φ = 105510616.

The previous prime is 211021231. The next prime is 211021241. The reversal of 211021234 is 432120112.

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., 196981225 + 14040009 = 14035^2 + 3747^2 .

It is a super-2 number, since 2×211021234² = 89059922397765512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211021231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52755307 + ... + 52755310.

Almost surely, 2^211021234 is an apocalyptic number.

211021234 is a deficient number, since it is larger than the sum of its proper divisors (105510620).

211021234 is a wasteful number, since it uses less digits than its factorization.

211021234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105510619.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211021234 is about 14526.5699323688. The cubic root of 211021234 is about 595.3541511433.

Adding to 211021234 its reverse (432120112), we get a palindrome (643141346).

The spelling of 211021234 in words is "two hundred eleven million, twenty-one thousand, two hundred thirty-four".