1220121021112 has 32 divisors (see below), whose sum is σ = 2752152681600. Its totient is φ = 495387481824.

The previous prime is 1220121021109. The next prime is 1220121021121. The reversal of 1220121021112 is 2111201210221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573364078 + ... + 573366205.

It is an arithmetic number, because the mean of its divisors is an integer number (86004771300).

Almost surely, 2^{1220121021112} is an apocalyptic number.

It is an amenable number.

1220121021112 is an abundant number, since it is smaller than the sum of its proper divisors (1532031660488).

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

1220121021112 is a wasteful number, since it uses less digits than its factorization.

1220121021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146730315 (or 1146730311 counting only the distinct ones).

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

Adding to 1220121021112 its reverse (2111201210221), we get a palindrome (3331322231333).

The spelling of 1220121021112 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred twelve".