1103031103721 has 2 divisors, whose sum is σ = 1103031103722. Its totient is φ = 1103031103720.

The previous prime is 1103031103711. The next prime is 1103031103751. The reversal of 1103031103721 is 1273011303011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086522708496 + 16508395225 = 1042364^2 + 128485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103031103721 - 2²⁶ = 1102963994857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1103031103711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551515551860 + 551515551861.

It is an arithmetic number, because the mean of its divisors is an integer number (551515551861).

Almost surely, 2^{1103031103721} is an apocalyptic number.

It is an amenable number.

1103031103721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103031103721 is an equidigital number, since it uses as much as digits as its factorization.

1103031103721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

Adding to 1103031103721 its reverse (1273011303011), we get a palindrome (2376042406732).

The spelling of 1103031103721 in words is "one trillion, one hundred three billion, thirty-one million, one hundred three thousand, seven hundred twenty-one".