11221235623 has 4 divisors (see below), whose sum is σ = 12084407608. Its totient is φ = 10358063640.

The previous prime is 11221235621. The next prime is 11221235647. The reversal of 11221235623 is 32653212211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32653212211 = 7949 ⋅4107839.

It is a cyclic number.

It is not a de Polignac number, because 11221235623 - 2¹ = 11221235621 is a prime.

It is a super-2 number, since 2×11221235623² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221235591 and 11221235600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221235621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431585973 + ... + 431585998.

It is an arithmetic number, because the mean of its divisors is an integer number (3021101902).

Almost surely, 2^11221235623 is an apocalyptic number.

11221235623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11221235623 is a deficient number, since it is larger than the sum of its proper divisors (863171985).

11221235623 is an equidigital number, since it uses as much as digits as its factorization.

11221235623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863171984.

The product of its digits is 4320, while the sum is 28.

Adding to 11221235623 its reverse (32653212211), we get a palindrome (43874447834).

The spelling of 11221235623 in words is "eleven billion, two hundred twenty-one million, two hundred thirty-five thousand, six hundred twenty-three".