12110011621 has 2 divisors, whose sum is σ = 12110011622. Its totient is φ = 12110011620.

The previous prime is 12110011597. The next prime is 12110011631. The reversal of 12110011621 is 12611001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11870102500 + 239909121 = 108950^2 + 15489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12110011621 - 2¹³ = 12110003429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12110011595 and 12110011604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12110011631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055005810 + 6055005811.

It is an arithmetic number, because the mean of its divisors is an integer number (6055005811).

Almost surely, 2^12110011621 is an apocalyptic number.

It is an amenable number.

12110011621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12110011621 is an equidigital number, since it uses as much as digits as its factorization.

12110011621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12110011621 its reverse (12611001121), we get a palindrome (24721012742).

The spelling of 12110011621 in words is "twelve billion, one hundred ten million, eleven thousand, six hundred twenty-one".