21210202201112 has 16 divisors (see below), whose sum is σ = 40615280811360. Its totient is φ = 10379460651424.

The previous prime is 21210202201087. The next prime is 21210202201121. The reversal of 21210202201112 is 21110220201212.

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, 28205055743 + ... + 28205056494.

It is an arithmetic number, because the mean of its divisors is an integer number (2538455050710).

Almost surely, 2^{21210202201112} is an apocalyptic number.

It is an amenable number.

21210202201112 is a deficient number, since it is larger than the sum of its proper divisors (19405078610248).

21210202201112 is a wasteful number, since it uses less digits than its factorization.

21210202201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56410112290 (or 56410112286 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210202201112 its reverse (21110220201212), we get a palindrome (42320422402324).

The spelling of 21210202201112 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, two hundred one thousand, one hundred twelve".