211211220312233 has 4 divisors (see below), whose sum is σ = 211356582474948. Its totient is φ = 211065858149520.

The previous prime is 211211220312229. The next prime is 211211220312263. The reversal of 211211220312233 is 332213022112112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147409514477824 + 63801705834409 = 12141232^2 + 7987597^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211220312233 - 2² = 211211220312229 is a prime.

It is a super-2 number, since 2×211211220312233² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211220312263) 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 3 ways as a sum of consecutive naturals, for example, 72681079178 + ... + 72681082083.

It is an arithmetic number, because the mean of its divisors is an integer number (52839145618737).

Almost surely, 2^{211211220312233} is an apocalyptic number.

It is an amenable number.

211211220312233 is a deficient number, since it is larger than the sum of its proper divisors (145362162715).

211211220312233 is a wasteful number, since it uses less digits than its factorization.

211211220312233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145362162714.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 211211220312233 its reverse (332213022112112), we get a palindrome (543424242424345).

The spelling of 211211220312233 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty million, three hundred twelve thousand, two hundred thirty-three".