211133221423 has 2 divisors, whose sum is σ = 211133221424. Its totient is φ = 211133221422.

The previous prime is 211133221399. The next prime is 211133221433. The reversal of 211133221423 is 324122331112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211133221423 - 2²⁹ = 210596350511 is a prime.

It is a super-2 number, since 2×211133221423² (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 (211133221433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566610711 + 105566610712.

It is an arithmetic number, because the mean of its divisors is an integer number (105566610712).

Almost surely, 2^211133221423 is an apocalyptic number.

211133221423 is a deficient number, since it is larger than the sum of its proper divisors (1).

211133221423 is an equidigital number, since it uses as much as digits as its factorization.

211133221423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

Adding to 211133221423 its reverse (324122331112), we get a palindrome (535255552535).

The spelling of 211133221423 in words is "two hundred eleven billion, one hundred thirty-three million, two hundred twenty-one thousand, four hundred twenty-three".