1220120121012 has 24 divisors (see below), whose sum is σ = 3065942868576. Its totient is φ = 375421575648.

The previous prime is 1220120121007. The next prime is 1220120121041. The reversal of 1220120121012 is 2101210210221.

It is a junction number, because it is equal to n+sod(n) for n = 1220120120982 and 1220120121000.

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 7 ways as a sum of consecutive naturals, for example, 3910641258 + ... + 3910641569.

It is an arithmetic number, because the mean of its divisors is an integer number (127747619524).

Almost surely, 2^{1220120121012} is an apocalyptic number.

1220120121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220120121012 is an abundant number, since it is smaller than the sum of its proper divisors (1845822747564).

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

1220120121012 is a wasteful number, since it uses less digits than its factorization.

1220120121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821282847 (or 7821282845 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220120121012 its reverse (2101210210221), we get a palindrome (3321330331233).

The spelling of 1220120121012 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty-one thousand, twelve".