211211330 has 32 divisors (see below), whose sum is σ = 415412928. Its totient is φ = 76680000.

The previous prime is 211211291. The next prime is 211211333. The reversal of 211211330 is 33112112.

It is a super-2 number, since 2×211211330² = 89220451840737800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92705 + ... + 94955.

It is an arithmetic number, because the mean of its divisors is an integer number (12981654).

Almost surely, 2^211211330 is an apocalyptic number.

211211330 is a deficient number, since it is larger than the sum of its proper divisors (204201598).

211211330 is a wasteful number, since it uses less digits than its factorization.

211211330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211211330 is about 14533.1115044233. Note that the first 3 decimals coincide. The cubic root of 211211330 is about 595.5328700864.

Adding to 211211330 its reverse (33112112), we get a palindrome (244323442).

The spelling of 211211330 in words is "two hundred eleven million, two hundred eleven thousand, three hundred thirty".