201111113021 has 12 divisors (see below), whose sum is σ = 251941395132. Its totient is φ = 159120880128.

The previous prime is 201111112949. The next prime is 201111113081. The reversal of 201111113021 is 120311111102.

201111113021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 93339415225 + 107771697796 = 305515^2 + 328286^2 .

It is a de Polignac number, because none of the positive numbers 2^k-201111113021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201111112987 and 201111113005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111113081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157857380 + ... + 157858653.

It is an arithmetic number, because the mean of its divisors is an integer number (20995116261).

Almost surely, 2^201111113021 is an apocalyptic number.

It is an amenable number.

201111113021 is a deficient number, since it is larger than the sum of its proper divisors (50830282111).

201111113021 is a wasteful number, since it uses less digits than its factorization.

201111113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315716060 (or 315716053 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 201111113021 its reverse (120311111102), we get a palindrome (321422224123).

The spelling of 201111113021 in words is "two hundred one billion, one hundred eleven million, one hundred thirteen thousand, twenty-one".