221121000221120 has 112 divisors (see below), whose sum is σ = 528924471931008. Its totient is φ = 88048684139520.

The previous prime is 221121000221057. The next prime is 221121000221131. The reversal of 221121000221120 is 21122000121122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651483779 + ... + 651823101.

Almost surely, 2^{221121000221120} is an apocalyptic number.

221121000221120 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 221121000221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264462235965504).

221121000221120 is an abundant number, since it is smaller than the sum of its proper divisors (307803471709888).

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

221121000221120 is a wasteful number, since it uses less digits than its factorization.

221121000221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348538 (or 348528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221121000221120 its reverse (21122000121122), we get a palindrome (242243000342242).

The spelling of 221121000221120 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one thousand, one hundred twenty".