211221143303 has 2 divisors, whose sum is σ = 211221143304. Its totient is φ = 211221143302.

The previous prime is 211221143293. The next prime is 211221143311. The reversal of 211221143303 is 303341122112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211221143303 - 2²⁰ = 211220094727 is a prime.

It is a super-2 number, since 2×211221143303² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211221143603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610571651 + 105610571652.

It is an arithmetic number, because the mean of its divisors is an integer number (105610571652).

Almost surely, 2^211221143303 is an apocalyptic number.

211221143303 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221143303 is an equidigital number, since it uses as much as digits as its factorization.

211221143303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211221143303 its reverse (303341122112), we get a palindrome (514562265415).

The spelling of 211221143303 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred forty-three thousand, three hundred three".