1220121112112 has 80 divisors (see below), whose sum is σ = 2853705541632. Its totient is φ = 494272558080.

The previous prime is 1220121112109. The next prime is 1220121112121. The reversal of 1220121112112 is 2112111210221.

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 15 ways as a sum of consecutive naturals, for example, 3936953 + ... + 4235544.

Almost surely, 2^{1220121112112} is an apocalyptic number.

It is an amenable number.

1220121112112 is an abundant number, since it is smaller than the sum of its proper divisors (1633584429520).

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

1220121112112 is a wasteful number, since it uses less digits than its factorization.

1220121112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172586 (or 8172580 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1220121112112 its reverse (2112111210221), we get a palindrome (3332232322333).

The spelling of 1220121112112 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twelve".