1221301200112 has 60 divisors (see below), whose sum is σ = 2752843169856. Its totient is φ = 523368760320.

The previous prime is 1221301200079. The next prime is 1221301200143. The reversal of 1221301200112 is 2110021031221.

It is a super-2 number, since 2×1221301200112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9746368 + ... + 9870880.

Almost surely, 2^{1221301200112} is an apocalyptic number.

It is an amenable number.

1221301200112 is an abundant number, since it is smaller than the sum of its proper divisors (1531541969744).

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

1221301200112 is a wasteful number, since it uses less digits than its factorization.

1221301200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137046 (or 137033 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221301200112 its reverse (2110021031221), we get a palindrome (3331322231333).

The spelling of 1221301200112 in words is "one trillion, two hundred twenty-one billion, three hundred one million, two hundred thousand, one hundred twelve".