20112220221012 has 36 divisors (see below), whose sum is σ = 52479198285696. Its totient is φ = 6487812974160.

The previous prime is 20112220221007. The next prime is 20112220221013. The reversal of 20112220221012 is 21012202221102.

It is a happy number.

20112220221012 is a `hidden beast` number, since 201 + 12 + 220 + 221 + 0 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112220221013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9010850238 + ... + 9010852469.

It is an arithmetic number, because the mean of its divisors is an integer number (1457755507936).

Almost surely, 2^{20112220221012} is an apocalyptic number.

It is an amenable number.

20112220221012 is an abundant number, since it is smaller than the sum of its proper divisors (32366978064684).

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

20112220221012 is a wasteful number, since it uses less digits than its factorization.

20112220221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18021702748 (or 18021702743 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20112220221012 its reverse (21012202221102), we get a palindrome (41124422442114).

The spelling of 20112220221012 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, two hundred twenty-one thousand, twelve".