211221030011 has 8 divisors (see below), whose sum is σ = 216507753264. Its totient is φ = 205951334400.

The previous prime is 211221029983. The next prime is 211221030037. The reversal of 211221030011 is 110030122112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211221030011 - 2²² = 211216835707 is a prime.

It is a super-2 number, since 2×211221030011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221030071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4231790 + ... + 4281411.

It is an arithmetic number, because the mean of its divisors is an integer number (27063469158).

Almost surely, 2^211221030011 is an apocalyptic number.

211221030011 is a deficient number, since it is larger than the sum of its proper divisors (5286723253).

211221030011 is an equidigital number, since it uses as much as digits as its factorization.

211221030011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513821.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211221030011 its reverse (110030122112), we get a palindrome (321251152123).

The spelling of 211221030011 in words is "two hundred eleven billion, two hundred twenty-one million, thirty thousand, eleven".