1221120112120 has 16 divisors (see below), whose sum is σ = 2747520252360. Its totient is φ = 488448044832.

The previous prime is 1221120112097. The next prime is 1221120112139. The reversal of 1221120112120 is 212110211221.

It is a super-2 number, since 2×1221120112120² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221120112094 and 1221120112103.

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, 15264001362 + ... + 15264001441.

Almost surely, 2^{1221120112120} is an apocalyptic number.

1221120112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221120112120 is an abundant number, since it is smaller than the sum of its proper divisors (1526400140240).

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

1221120112120 is a wasteful number, since it uses less digits than its factorization.

1221120112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30528002814 (or 30528002810 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221120112120 its reverse (212110211221), we get a palindrome (1433230323341).

The spelling of 1221120112120 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty".