111102212121623 has 2 divisors, whose sum is σ = 111102212121624. Its totient is φ = 111102212121622.

The previous prime is 111102212121611. The next prime is 111102212121697. The reversal of 111102212121623 is 326121212201111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102212121623 is a prime.

It is a super-2 number, since 2×111102212121623² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111102212121592 and 111102212121601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111102212121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551106060811 + 55551106060812.

It is an arithmetic number, because the mean of its divisors is an integer number (55551106060812).

Almost surely, 2^{111102212121623} is an apocalyptic number.

111102212121623 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102212121623 is an equidigital number, since it uses as much as digits as its factorization.

111102212121623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 111102212121623 its reverse (326121212201111), we get a palindrome (437223424322734).

The spelling of 111102212121623 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, six hundred twenty-three".