901132021 has 2 divisors, whose sum is σ = 901132022. Its totient is φ = 901132020.

The previous prime is 901132013. The next prime is 901132027. The reversal of 901132021 is 120231109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580328100 + 320803921 = 24090^2 + 17911^2 .

It is an emirp because it is prime and its reverse (120231109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 901132021 - 2³ = 901132013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 901132021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901132027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450566010 + 450566011.

It is an arithmetic number, because the mean of its divisors is an integer number (450566011).

Almost surely, 2^901132021 is an apocalyptic number.

It is an amenable number.

901132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

901132021 is an equidigital number, since it uses as much as digits as its factorization.

901132021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 901132021 is about 30018.8610876562. The cubic root of 901132021 is about 965.8940128793.

The spelling of 901132021 in words is "nine hundred one million, one hundred thirty-two thousand, twenty-one".