211221020213 has 8 divisors (see below), whose sum is σ = 241824222528. Its totient is φ = 180725010624.

The previous prime is 211221020203. The next prime is 211221020233. The reversal of 211221020213 is 312020122112.

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 211221020213 - 2¹⁰ = 211221019189 is a prime.

It is a super-2 number, since 2×211221020213² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221020191 and 211221020200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221020203) 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, 26793956 + ... + 26801837.

It is an arithmetic number, because the mean of its divisors is an integer number (30228027816).

Almost surely, 2^211221020213 is an apocalyptic number.

It is an amenable number.

211221020213 is a deficient number, since it is larger than the sum of its proper divisors (30603202315).

211221020213 is an equidigital number, since it uses as much as digits as its factorization.

211221020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53596363.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211221020213 its reverse (312020122112), we get a palindrome (523241142325).

The spelling of 211221020213 in words is "two hundred eleven billion, two hundred twenty-one million, twenty thousand, two hundred thirteen".