202121101112 has 128 divisors (see below), whose sum is σ = 470292480000. Its totient is φ = 79474053120.

The previous prime is 202121101097. The next prime is 202121101153. The reversal of 202121101112 is 211101121202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5998889 + ... + 6032487.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160000).

Almost surely, 2^202121101112 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 202121101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235146240000).

202121101112 is an abundant number, since it is smaller than the sum of its proper divisors (268171378888).

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

202121101112 is a wasteful number, since it uses less digits than its factorization.

202121101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33789 (or 33785 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 202121101112 its reverse (211101121202), we get a palindrome (413222222314).

The spelling of 202121101112 in words is "two hundred two billion, one hundred twenty-one million, one hundred one thousand, one hundred twelve".