101403721 has 2 divisors, whose sum is σ = 101403722. Its totient is φ = 101403720.

The previous prime is 101403707. The next prime is 101403733. The reversal of 101403721 is 127304101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84272400 + 17131321 = 9180^2 + 4139^2 .

It is an emirp because it is prime and its reverse (127304101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101403721 - 2¹¹ = 101401673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101403751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50701860 + 50701861.

It is an arithmetic number, because the mean of its divisors is an integer number (50701861).

Almost surely, 2^101403721 is an apocalyptic number.

It is an amenable number.

101403721 is a deficient number, since it is larger than the sum of its proper divisors (1).

101403721 is an equidigital number, since it uses as much as digits as its factorization.

101403721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 101403721 is about 10069.9414596114. The cubic root of 101403721 is about 466.3206316291.

Adding to 101403721 its reverse (127304101), we get a palindrome (228707822).

It can be divided in two parts, 10140 and 3721, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 101403721 in words is "one hundred one million, four hundred three thousand, seven hundred twenty-one".