101316421 has 2 divisors, whose sum is σ = 101316422. Its totient is φ = 101316420.

The previous prime is 101316407. The next prime is 101316427. The reversal of 101316421 is 124613101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 34975396 = 8145^2 + 5914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101316421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101316427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50658210 + 50658211.

It is an arithmetic number, because the mean of its divisors is an integer number (50658211).

Almost surely, 2^101316421 is an apocalyptic number.

It is an amenable number.

101316421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101316421 is an equidigital number, since it uses as much as digits as its factorization.

101316421 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 101316421 is about 10065.6058436639. The cubic root of 101316421 is about 466.1867723753.

Adding to 101316421 its reverse (124613101), we get a palindrome (225929522).

The spelling of 101316421 in words is "one hundred one million, three hundred sixteen thousand, four hundred twenty-one".