221231113412340 has 192 divisors, whose sum is σ = 637679059476480. Its totient is φ = 57279672806400.

The previous prime is 221231113412329. The next prime is 221231113412371. The reversal of 221231113412340 is 43214311132122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 221231113412298 and 221231113412307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 314329464 + ... + 315032496.

It is an arithmetic number, because the mean of its divisors is an integer number (3321245101440).

Almost surely, 2^{221231113412340} is an apocalyptic number.

221231113412340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221231113412340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318839529738240).

221231113412340 is an abundant number, since it is smaller than the sum of its proper divisors (416447946064140).

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

221231113412340 is a wasteful number, since it uses less digits than its factorization.

221231113412340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703982 (or 703980 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 221231113412340 its reverse (43214311132122), we get a palindrome (264445424544462).

The spelling of 221231113412340 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, one hundred thirteen million, four hundred twelve thousand, three hundred forty".