211211330406 has 32 divisors (see below), whose sum is σ = 440821059840. Its totient is φ = 67337824224.

The previous prime is 211211330389. The next prime is 211211330417. The reversal of 211211330406 is 604033112112.

It is a happy number.

211211330406 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211211330406² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2156365 + ... + 2252183.

It is an arithmetic number, because the mean of its divisors is an integer number (13775658120).

Almost surely, 2^211211330406 is an apocalyptic number.

211211330406 is an abundant number, since it is smaller than the sum of its proper divisors (229609729434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211211330406 is a wasteful number, since it uses less digits than its factorization.

211211330406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111820.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 211211330406 its reverse (604033112112), we get a palindrome (815244442518).

The spelling of 211211330406 in words is "two hundred eleven billion, two hundred eleven million, three hundred thirty thousand, four hundred six".