1123240621 has 2 divisors, whose sum is σ = 1123240622. Its totient is φ = 1123240620.

The previous prime is 1123240597. The next prime is 1123240681. The reversal of 1123240621 is 1260423211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636552900 + 486687721 = 25230^2 + 22061^2 .

It is an emirp because it is prime and its reverse (1260423211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123240621 - 2⁵ = 1123240589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123240592 and 1123240601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123240681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561620310 + 561620311.

It is an arithmetic number, because the mean of its divisors is an integer number (561620311).

Almost surely, 2^1123240621 is an apocalyptic number.

It is an amenable number.

1123240621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123240621 is an equidigital number, since it uses as much as digits as its factorization.

1123240621 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 22.

The square root of 1123240621 is about 33514.7821266975. The cubic root of 1123240621 is about 1039.4994574185.

Adding to 1123240621 its reverse (1260423211), we get a palindrome (2383663832).

The spelling of 1123240621 in words is "one billion, one hundred twenty-three million, two hundred forty thousand, six hundred twenty-one".