1001001221120 has 44 divisors (see below), whose sum is σ = 2401229894664. Its totient is φ = 400400486400.

The previous prime is 1001001221119. The next prime is 1001001221137. The reversal of 1001001221120 is 211221001001.

It is a super-2 number, since 2×1001001221120² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97748906 + ... + 97759145.

Almost surely, 2^{1001001221120} is an apocalyptic number.

1001001221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001001221120 is an abundant number, since it is smaller than the sum of its proper divisors (1400228673544).

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

1001001221120 is an equidigital number, since it uses as much as digits as its factorization.

1001001221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195508076 (or 195508058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001001221120 its reverse (211221001001), we get a palindrome (1212222222121).

The spelling of 1001001221120 in words is "one trillion, one billion, one million, two hundred twenty-one thousand, one hundred twenty".