901540211113221 has 4 divisors (see below), whose sum is σ = 1202053614817632. Its totient is φ = 601026807408812.

The previous prime is 901540211113121. The next prime is 901540211113231. The reversal of 901540211113221 is 122311112045109.

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 901540211113221 - 2³¹ = 901538063629573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901540211113231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150256701852201 + ... + 150256701852206.

It is an arithmetic number, because the mean of its divisors is an integer number (300513403704408).

Almost surely, 2^{901540211113221} is an apocalyptic number.

It is an amenable number.

901540211113221 is a deficient number, since it is larger than the sum of its proper divisors (300513403704411).

901540211113221 is a wasteful number, since it uses less digits than its factorization.

901540211113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300513403704410.

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 901540211113221 in words is "nine hundred one trillion, five hundred forty billion, two hundred eleven million, one hundred thirteen thousand, two hundred twenty-one".