1221122001112 has 16 divisors (see below), whose sum is σ = 2465727117840. Its totient is φ = 563594769696.

The previous prime is 1221122001107. The next prime is 1221122001251. The reversal of 1221122001112 is 2111002211221.

It is a super-2 number, since 2×1221122001112² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5870778748 + ... + 5870778955.

It is an arithmetic number, because the mean of its divisors is an integer number (154107944865).

Almost surely, 2^{1221122001112} is an apocalyptic number.

It is an amenable number.

1221122001112 is an abundant number, since it is smaller than the sum of its proper divisors (1244605116728).

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

1221122001112 is a wasteful number, since it uses less digits than its factorization.

1221122001112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11741557722 (or 11741557718 counting only the distinct ones).

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

Adding to 1221122001112 its reverse (2111002211221), we get a palindrome (3332124212333).

The spelling of 1221122001112 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one thousand, one hundred twelve".