101423221 has 2 divisors, whose sum is σ = 101423222. Its totient is φ = 101423220.

The previous prime is 101423219. The next prime is 101423233. The reversal of 101423221 is 122324101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 1703025 = 9986^2 + 1305^2 .

It is an emirp because it is prime and its reverse (122324101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101423221 - 2¹ = 101423219 is a prime.

Together with 101423219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 101423195 and 101423204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101424221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50711610 + 50711611.

It is an arithmetic number, because the mean of its divisors is an integer number (50711611).

Almost surely, 2^101423221 is an apocalyptic number.

It is an amenable number.

101423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101423221 is an equidigital number, since it uses as much as digits as its factorization.

101423221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 101423221 is about 10070.9096411397. The cubic root of 101423221 is about 466.3505209646.

Adding to 101423221 its reverse (122324101), we get a palindrome (223747322).

The spelling of 101423221 in words is "one hundred one million, four hundred twenty-three thousand, two hundred twenty-one".