211213033321 has 2 divisors, whose sum is σ = 211213033322. Its totient is φ = 211213033320.

The previous prime is 211213033267. The next prime is 211213033333. The reversal of 211213033321 is 123330312112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154597589721 + 56615443600 = 393189^2 + 237940^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213033321 - 2²⁵ = 211179478889 is a prime.

It is a super-2 number, since 2×211213033321² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211213033292 and 211213033301.

It is not a weakly prime, because it can be changed into another prime (211213033121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606516660 + 105606516661.

It is an arithmetic number, because the mean of its divisors is an integer number (105606516661).

Almost surely, 2^211213033321 is an apocalyptic number.

It is an amenable number.

211213033321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213033321 is an equidigital number, since it uses as much as digits as its factorization.

211213033321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211213033321 its reverse (123330312112), we get a palindrome (334543345433).

The spelling of 211213033321 in words is "two hundred eleven billion, two hundred thirteen million, thirty-three thousand, three hundred twenty-one".