211213320321 has 16 divisors (see below), whose sum is σ = 283010457600. Its totient is φ = 140113319040.

The previous prime is 211213320319. The next prime is 211213320349. The reversal of 211213320321 is 123023312112.

It is not a de Polignac number, because 211213320321 - 2¹ = 211213320319 is a prime.

It is a super-2 number, since 2×211213320321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211213320121) 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, 985216 + ... + 1180286.

It is an arithmetic number, because the mean of its divisors is an integer number (17688153600).

Almost surely, 2^211213320321 is an apocalyptic number.

It is an amenable number.

211213320321 is a deficient number, since it is larger than the sum of its proper divisors (71797137279).

211213320321 is a wasteful number, since it uses less digits than its factorization.

211213320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196856.

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

Adding to 211213320321 its reverse (123023312112), we get a palindrome (334236632433).

The spelling of 211213320321 in words is "two hundred eleven billion, two hundred thirteen million, three hundred twenty thousand, three hundred twenty-one".