901123021 has 4 divisors (see below), whose sum is σ = 902628000. Its totient is φ = 899618044.

The previous prime is 901123019. The next prime is 901123037. The reversal of 901123021 is 120321109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 901123021 - 2¹ = 901123019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 901123021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901123121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751591 + ... + 752788.

It is an arithmetic number, because the mean of its divisors is an integer number (225657000).

Almost surely, 2^901123021 is an apocalyptic number.

It is an amenable number.

901123021 is a deficient number, since it is larger than the sum of its proper divisors (1504979).

901123021 is a wasteful number, since it uses less digits than its factorization.

901123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504978.

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

The square root of 901123021 is about 30018.7111815281. The cubic root of 901123021 is about 965.8907972665.

The spelling of 901123021 in words is "nine hundred one million, one hundred twenty-three thousand, twenty-one".