1103713727721 has 16 divisors (see below), whose sum is σ = 1605454836480. Its totient is φ = 668895306320.

The previous prime is 1103713727693. The next prime is 1103713727729. The reversal of 1103713727721 is 1277273173011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1103713727721 - 2⁵ = 1103713727689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1103713727729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490546 + ... + 1564628.

It is an arithmetic number, because the mean of its divisors is an integer number (100340927280).

Almost surely, 2^{1103713727721} is an apocalyptic number.

1103713727721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1103713727721 is a deficient number, since it is larger than the sum of its proper divisors (501741108759).

1103713727721 is a wasteful number, since it uses less digits than its factorization.

1103713727721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105236.

The product of its (nonzero) digits is 86436, while the sum is 42.

The spelling of 1103713727721 in words is "one trillion, one hundred three billion, seven hundred thirteen million, seven hundred twenty-seven thousand, seven hundred twenty-one".