9401221399 has 8 divisors (see below), whose sum is σ = 9535370112. Its totient is φ = 9267121080.

The previous prime is 9401221309. The next prime is 9401221409. The reversal of 9401221399 is 9931221049.

9401221399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9401221399 - 2²¹ = 9399124247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9401221309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591612 + ... + 607294.

It is an arithmetic number, because the mean of its divisors is an integer number (1191921264).

Almost surely, 2^9401221399 is an apocalyptic number.

9401221399 is a deficient number, since it is larger than the sum of its proper divisors (134148713).

9401221399 is a wasteful number, since it uses less digits than its factorization.

9401221399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24197.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 9401221399 is about 96959.8958281206. The cubic root of 9401221399 is about 2110.5456985727.

The spelling of 9401221399 in words is "nine billion, four hundred one million, two hundred twenty-one thousand, three hundred ninety-nine".