103635440621 has 2 divisors, whose sum is σ = 103635440622. Its totient is φ = 103635440620.

The previous prime is 103635440581. The next prime is 103635440633. The reversal of 103635440621 is 126044536301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97852598596 + 5782842025 = 312814^2 + 76045^2 .

It is a cyclic number.

It is not a de Polignac number, because 103635440621 - 2¹⁴ = 103635424237 is a prime.

It is a super-3 number, since 3×103635440621³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103635440221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51817720310 + 51817720311.

It is an arithmetic number, because the mean of its divisors is an integer number (51817720311).

Almost surely, 2^103635440621 is an apocalyptic number.

It is an amenable number.

103635440621 is a deficient number, since it is larger than the sum of its proper divisors (1).

103635440621 is an equidigital number, since it uses as much as digits as its factorization.

103635440621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 103635440621 its reverse (126044536301), we get a palindrome (229679976922).

The spelling of 103635440621 in words is "one hundred three billion, six hundred thirty-five million, four hundred forty thousand, six hundred twenty-one".