211121101223 has 2 divisors, whose sum is σ = 211121101224. Its totient is φ = 211121101222.

The previous prime is 211121101207. The next prime is 211121101229. The reversal of 211121101223 is 322101121112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121101223 - 2⁴ = 211121101207 is a prime.

It is a super-2 number, since 2×211121101223² (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 (211121101229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560550611 + 105560550612.

It is an arithmetic number, because the mean of its divisors is an integer number (105560550612).

Almost surely, 2^211121101223 is an apocalyptic number.

211121101223 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121101223 is an equidigital number, since it uses as much as digits as its factorization.

211121101223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211121101223 its reverse (322101121112), we get a palindrome (533222222335).

The spelling of 211121101223 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-three".