1201221020112 has 80 divisors (see below), whose sum is σ = 3187758470400. Its totient is φ = 389495333376.

The previous prime is 1201221020099. The next prime is 1201221020137. The reversal of 1201221020112 is 2110201221021.

It is a junction number, because it is equal to n+sod(n) for n = 1201221020091 and 1201221020100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7850514 + ... + 8002062.

It is an arithmetic number, because the mean of its divisors is an integer number (39846980880).

Almost surely, 2^{1201221020112} is an apocalyptic number.

1201221020112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201221020112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593879235200).

1201221020112 is an abundant number, since it is smaller than the sum of its proper divisors (1986537450288).

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

1201221020112 is a wasteful number, since it uses less digits than its factorization.

1201221020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156060 (or 156054 counting only the distinct ones).

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

Adding to 1201221020112 its reverse (2110201221021), we get a palindrome (3311422241133).

The spelling of 1201221020112 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty thousand, one hundred twelve".