1211111222023 has 2 divisors, whose sum is σ = 1211111222024. Its totient is φ = 1211111222022.

The previous prime is 1211111221987. The next prime is 1211111222039. The reversal of 1211111222023 is 3202221111121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211111222023 - 2²¹ = 1211109124871 is a prime.

It is a super-2 number, since 2×1211111222023² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211111222053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555611011 + 605555611012.

It is an arithmetic number, because the mean of its divisors is an integer number (605555611012).

Almost surely, 2^{1211111222023} is an apocalyptic number.

1211111222023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211111222023 is an equidigital number, since it uses as much as digits as its factorization.

1211111222023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211111222023 its reverse (3202221111121), we get a palindrome (4413332333144).

The spelling of 1211111222023 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, twenty-three".