211213210 has 16 divisors (see below), whose sum is σ = 409428936. Its totient is φ = 77986368.

The previous prime is 211213207. The next prime is 211213229. The reversal of 211213210 is 12312112.

It can be written as a sum of positive squares in 4 ways, for example, as 177235969 + 33977241 = 13313^2 + 5829^2 .

It is a super-2 number, since 2×211213210² = 89222040157008200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812229 + ... + 812488.

Almost surely, 2^211213210 is an apocalyptic number.

211213210 is a deficient number, since it is larger than the sum of its proper divisors (198215726).

211213210 is a wasteful number, since it uses less digits than its factorization.

211213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624737.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 211213210 is about 14533.1761841657. The cubic root of 211213210 is about 595.5346370346.

Adding to 211213210 its reverse (12312112), we get a palindrome (223525322).

The spelling of 211213210 in words is "two hundred eleven million, two hundred thirteen thousand, two hundred ten".