1103564477621 has 2 divisors, whose sum is σ = 1103564477622. Its totient is φ = 1103564477620.

The previous prime is 1103564477593. The next prime is 1103564477623. The reversal of 1103564477621 is 1267744653011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077622543396 + 25941934225 = 1038086^2 + 161065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103564477621 - 2³⁴ = 1086384608437 is a prime.

Together with 1103564477623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103564477623) 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, 551782238810 + 551782238811.

It is an arithmetic number, because the mean of its divisors is an integer number (551782238811).

Almost surely, 2^{1103564477621} is an apocalyptic number.

It is an amenable number.

1103564477621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103564477621 is an equidigital number, since it uses as much as digits as its factorization.

1103564477621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 1103564477621 in words is "one trillion, one hundred three billion, five hundred sixty-four million, four hundred seventy-seven thousand, six hundred twenty-one".