221103553398 has 128 divisors (see below), whose sum is σ = 565066091520. Its totient is φ = 56097861120.

The previous prime is 221103553397. The next prime is 221103553399. The reversal of 221103553398 is 893355301122.

It is an interprime number because it is at equal distance from previous prime (221103553397) and next prime (221103553399).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103553397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4360813 + ... + 4411223.

It is an arithmetic number, because the mean of its divisors is an integer number (4414578840).

Almost surely, 2^221103553398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221103553398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282533045760).

221103553398 is an abundant number, since it is smaller than the sum of its proper divisors (343962538122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221103553398 is a wasteful number, since it uses less digits than its factorization.

221103553398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50742.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 221103553398 in words is "two hundred twenty-one billion, one hundred three million, five hundred fifty-three thousand, three hundred ninety-eight".