103085745721 has 12 divisors (see below), whose sum is σ = 122840856180. Its totient is φ = 86204106240.

The previous prime is 103085745641. The next prime is 103085745727. The reversal of 103085745721 is 127547580301.

It can be written as a sum of positive squares in 2 ways, for example, as 40004400121 + 63081345600 = 200011^2 + 251160^2 .

It is not a de Polignac number, because 103085745721 - 2⁹ = 103085745209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103085745727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25653976 + ... + 25657993.

It is an arithmetic number, because the mean of its divisors is an integer number (10236738015).

Almost surely, 2^103085745721 is an apocalyptic number.

It is an amenable number.

103085745721 is a deficient number, since it is larger than the sum of its proper divisors (19755110459).

103085745721 is an equidigital number, since it uses as much as digits as its factorization.

103085745721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51312024 (or 51312017 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 103085745721 in words is "one hundred three billion, eighty-five million, seven hundred forty-five thousand, seven hundred twenty-one".