201112010021 has 4 divisors (see below), whose sum is σ = 216582164652.
Its totient is φ = 185641855392.
The previous prime is 201112010009. The next prime is 201112010041. The reversal of 201112010021 is 120010211102.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 101704225921 + 99407784100 = 318911^2 + 315290^2
It is a cyclic number.
It is not a de Polignac number, because 201112010021 - 214 = 201111993637 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 201112009984 and 201112010011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (201112010041) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7735077296 + ... + 7735077321.
It is an arithmetic number, because the mean of its divisors is an integer number (54145541163).
Almost surely, 2201112010021 is an apocalyptic number.
It is an amenable number.
201112010021 is a deficient number, since it is larger than the sum of its proper divisors (15470154631).
201112010021 is a wasteful number, since it uses less digits than its factorization.
201112010021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15470154630.
The product of its (nonzero) digits is 8, while the sum is 11.
Adding to 201112010021 its reverse (120010211102), we get a palindrome (321122221123).
The spelling of 201112010021 in words is "two hundred one billion, one hundred twelve million, ten thousand, twenty-one".