1123606036921 has 2 divisors, whose sum is σ = 1123606036922. Its totient is φ = 1123606036920.

The previous prime is 1123606036913. The next prime is 1123606036939. The reversal of 1123606036921 is 1296306063211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123523681296 + 82355625 = 1059964^2 + 9075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123606036921 - 2³ = 1123606036913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123606036981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561803018460 + 561803018461.

It is an arithmetic number, because the mean of its divisors is an integer number (561803018461).

Almost surely, 2^{1123606036921} is an apocalyptic number.

It is an amenable number.

1123606036921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123606036921 is an equidigital number, since it uses as much as digits as its factorization.

1123606036921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 1123606036921 in words is "one trillion, one hundred twenty-three billion, six hundred six million, thirty-six thousand, nine hundred twenty-one".