221012398 has 8 divisors (see below), whose sum is σ = 331632720. Its totient is φ = 110468160.

The previous prime is 221012387. The next prime is 221012399. The reversal of 221012398 is 893210122.

221012398 is digitally balanced in base 2, 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012399) 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, 11098 + ... + 23773.

It is an arithmetic number, because the mean of its divisors is an integer number (41454090).

Almost surely, 2^221012398 is an apocalyptic number.

221012398 is a deficient number, since it is larger than the sum of its proper divisors (110620322).

221012398 is a wasteful number, since it uses less digits than its factorization.

221012398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38042.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 221012398 is about 14866.4857313354. The cubic root of 221012398 is about 604.6056652132.

The spelling of 221012398 in words is "two hundred twenty-one million, twelve thousand, three hundred ninety-eight".