211231022 has 4 divisors (see below), whose sum is σ = 316846536. Its totient is φ = 105615510.

The previous prime is 211230997. The next prime is 211231049. The reversal of 211231022 is 220132112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 211230988 and 211231006.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 52807754 + ... + 52807757.

It is an arithmetic number, because the mean of its divisors is an integer number (79211634).

Almost surely, 2^211231022 is an apocalyptic number.

211231022 is a deficient number, since it is larger than the sum of its proper divisors (105615514).

211231022 is a wasteful number, since it uses less digits than its factorization.

211231022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105615513.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 211231022 is about 14533.7889760379. The cubic root of 211231022 is about 595.5513774093.

Adding to 211231022 its reverse (220132112), we get a palindrome (431363134).

The spelling of 211231022 in words is "two hundred eleven million, two hundred thirty-one thousand, twenty-two".