21020201201112 has 128 divisors (see below), whose sum is σ = 54076970615040. Its totient is φ = 6803960117760.

The previous prime is 21020201201029. The next prime is 21020201201117. The reversal of 21020201201112 is 21110210202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020201201091 and 21020201201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020201201117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1425380923 + ... + 1425395669.

It is an arithmetic number, because the mean of its divisors is an integer number (422476332930).

Almost surely, 2^{21020201201112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21020201201112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27038485307520).

21020201201112 is an abundant number, since it is smaller than the sum of its proper divisors (33056769413928).

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

21020201201112 is a wasteful number, since it uses less digits than its factorization.

21020201201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17841 (or 17837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21020201201112 its reverse (21110210202012), we get a palindrome (42130411403124).

The spelling of 21020201201112 in words is "twenty-one trillion, twenty billion, two hundred one million, two hundred one thousand, one hundred twelve".