21220201121112 has 128 divisors (see below), whose sum is σ = 67704240000000. Its totient is φ = 6032447612928.

The previous prime is 21220201121071. The next prime is 21220201121129. The reversal of 21220201121112 is 21112110202212.

21220201121112 is a `hidden beast` number, since 21 + 220 + 201 + 1 + 211 + 12 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34961737 + ... + 35563512.

It is an arithmetic number, because the mean of its divisors is an integer number (528939375000).

Almost surely, 2^{21220201121112} is an apocalyptic number.

It is an amenable number.

21220201121112 is an abundant number, since it is smaller than the sum of its proper divisors (46484038878888).

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

21220201121112 is a wasteful number, since it uses less digits than its factorization.

21220201121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70525470 (or 70525460 counting only the distinct ones).

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

Adding to 21220201121112 its reverse (21112110202212), we get a palindrome (42332311323324).

The spelling of 21220201121112 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, one hundred twenty-one thousand, one hundred twelve".