20111221220112 has 120 divisors (see below), whose sum is σ = 61406417112768. Its totient is φ = 6093689184000.

The previous prime is 20111221220023. The next prime is 20111221220141. The reversal of 20111221220112 is 21102212211102.

20111221220112 is a `hidden beast` number, since 2 + 0 + 111 + 221 + 220 + 112 = 666.

It is a super-2 number, since 2×20111221220112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15042013 + ... + 16324355.

Almost surely, 2^{20111221220112} is an apocalyptic number.

20111221220112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20111221220112 is an abundant number, since it is smaller than the sum of its proper divisors (41295195892656).

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

20111221220112 is a wasteful number, since it uses less digits than its factorization.

20111221220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292269 (or 1292260 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111221220112 its reverse (21102212211102), we get a palindrome (41213433431214).

The spelling of 20111221220112 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twelve".