21022020112012 has 12 divisors (see below), whose sum is σ = 36832912204480. Its totient is φ = 10498330910736.

The previous prime is 21022020111943. The next prime is 21022020112019. The reversal of 21022020112012 is 21021102022012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21022020112019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3169782588 + ... + 3169789219.

Almost surely, 2^{21022020112012} is an apocalyptic number.

It is an amenable number.

21022020112012 is a deficient number, since it is larger than the sum of its proper divisors (15810892092468).

21022020112012 is a wasteful number, since it uses less digits than its factorization.

21022020112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339572640 (or 6339572638 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022020112012 its reverse (21021102022012), we get a palindrome (42043122134024).

Subtracting from 21022020112012 its reverse (21021102022012), we obtain a square (918090000 = 30300²).

The spelling of 21022020112012 in words is "twenty-one trillion, twenty-two billion, twenty million, one hundred twelve thousand, twelve".