11622553021 has 2 divisors, whose sum is σ = 11622553022. Its totient is φ = 11622553020.

The previous prime is 11622553003. The next prime is 11622553087. The reversal of 11622553021 is 12035522611.

11622553021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492912025 + 129640996 = 107205^2 + 11386^2 .

It is a cyclic number.

It is not a de Polignac number, because 11622553021 - 2⁹ = 11622552509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11622553091) 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, 5811276510 + 5811276511.

It is an arithmetic number, because the mean of its divisors is an integer number (5811276511).

Almost surely, 2^11622553021 is an apocalyptic number.

It is an amenable number.

11622553021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11622553021 is an equidigital number, since it uses as much as digits as its factorization.

11622553021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 11622553021 in words is "eleven billion, six hundred twenty-two million, five hundred fifty-three thousand, twenty-one".