1000000221120 has 336 divisors, whose sum is σ = 3484958536800. Its totient is φ = 263172169728.

The previous prime is 1000000221107. The next prime is 1000000221131. The reversal of 1000000221120 is 211220000001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67364419 + ... + 67379261.

Almost surely, 2^{1000000221120} is an apocalyptic number.

1000000221120 is a gapful number since it is divisible by the number (10) 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 1000000221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742479268400).

1000000221120 is an abundant number, since it is smaller than the sum of its proper divisors (2484958315680).

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

1000000221120 is a wasteful number, since it uses less digits than its factorization.

1000000221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15172 (or 15159 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1000000221120 its reverse (211220000001), we get a palindrome (1211220221121).

The spelling of 1000000221120 in words is "one trillion, two hundred twenty-one thousand, one hundred twenty".