211211330430 has 32 divisors (see below), whose sum is σ = 506921631264. Its totient is φ = 56321417216.

The previous prime is 211211330417. The next prime is 211211330431. The reversal of 211211330430 is 34033112112.

It is a super-2 number, since 2×211211330430² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211330397 and 211211330406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211330431) 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, 1283734 + ... + 1438886.

It is an arithmetic number, because the mean of its divisors is an integer number (15841300977).

Almost surely, 2^211211330430 is an apocalyptic number.

211211330430 is an abundant number, since it is smaller than the sum of its proper divisors (295710300834).

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

211211330430 is a wasteful number, since it uses less digits than its factorization.

211211330430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200540.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211211330430 its reverse (34033112112), we get a palindrome (245244442542).

The spelling of 211211330430 in words is "two hundred eleven billion, two hundred eleven million, three hundred thirty thousand, four hundred thirty".