211221130321 has 8 divisors (see below), whose sum is σ = 212571931904. Its totient is φ = 209873628720.

The previous prime is 211221130243. The next prime is 211221130339. The reversal of 211221130321 is 123031122112.

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 211221130321 - 2²³ = 211212741713 is a prime.

It is a super-2 number, since 2×211221130321² (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 (211221134321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696510 + ... + 952663.

It is an arithmetic number, because the mean of its divisors is an integer number (26571491488).

Almost surely, 2^211221130321 is an apocalyptic number.

It is an amenable number.

211221130321 is a deficient number, since it is larger than the sum of its proper divisors (1350801583).

211221130321 is a wasteful number, since it uses less digits than its factorization.

211221130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649991.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211221130321 its reverse (123031122112), we get a palindrome (334252252433).

The spelling of 211221130321 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred thirty thousand, three hundred twenty-one".