21202020201112 has 16 divisors (see below), whose sum is σ = 39754035765360. Its totient is φ = 10600943997024.

The previous prime is 21202020201071. The next prime is 21202020201127. The reversal of 21202020201112 is 21110202020212.

It is a happy number.

It is a super-2 number, since 2×21202020201112² (a number of 27 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, 6886308 + ... + 9477619.

It is an arithmetic number, because the mean of its divisors is an integer number (2484627235335).

Almost surely, 2^{21202020201112} is an apocalyptic number.

It is an amenable number.

21202020201112 is a deficient number, since it is larger than the sum of its proper divisors (18552015564248).

21202020201112 is a wasteful number, since it uses less digits than its factorization.

21202020201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16525890 (or 16525886 counting only the distinct ones).

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

Adding to 21202020201112 its reverse (21110202020212), we get a palindrome (42312222221324).

The spelling of 21202020201112 in words is "twenty-one trillion, two hundred two billion, twenty million, two hundred one thousand, one hundred twelve".