101422621 has 2 divisors, whose sum is σ = 101422622. Its totient is φ = 101422620.

The previous prime is 101422619. The next prime is 101422631. The reversal of 101422621 is 126224101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80820100 + 20602521 = 8990^2 + 4539^2 .

It is an emirp because it is prime and its reverse (126224101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101422621 - 2¹ = 101422619 is a prime.

Together with 101422619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101422631) 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, 50711310 + 50711311.

It is an arithmetic number, because the mean of its divisors is an integer number (50711311).

Almost surely, 2^101422621 is an apocalyptic number.

It is an amenable number.

101422621 is a deficient number, since it is larger than the sum of its proper divisors (1).

101422621 is an equidigital number, since it uses as much as digits as its factorization.

101422621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 101422621 is about 10070.8798523267. The cubic root of 101422621 is about 466.3496013498.

Adding to 101422621 its reverse (126224101), we get a palindrome (227646722).

The spelling of 101422621 in words is "one hundred one million, four hundred twenty-two thousand, six hundred twenty-one".