1403116021 has 2 divisors, whose sum is σ = 1403116022. Its totient is φ = 1403116020.

The previous prime is 1403116007. The next prime is 1403116027. The reversal of 1403116021 is 1206113041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881496100 + 521619921 = 29690^2 + 22839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403116021 - 2⁹ = 1403115509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1403116021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1403116027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701558010 + 701558011.

It is an arithmetic number, because the mean of its divisors is an integer number (701558011).

Almost surely, 2^1403116021 is an apocalyptic number.

It is an amenable number.

1403116021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403116021 is an equidigital number, since it uses as much as digits as its factorization.

1403116021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1403116021 is about 37458.1903059932. The cubic root of 1403116021 is about 1119.5182933283.

Adding to 1403116021 its reverse (1206113041), we get a palindrome (2609229062).

The spelling of 1403116021 in words is "one billion, four hundred three million, one hundred sixteen thousand, twenty-one".