201010210021111 has 4 divisors (see below), whose sum is σ = 201696251693832. Its totient is φ = 200324168348392.

The previous prime is 201010210021109. The next prime is 201010210021147. The reversal of 201010210021111 is 111120012010102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201010210021111 - 2¹ = 201010210021109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201010210021091 and 201010210021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010210021151) 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, 343020835921 + ... + 343020836506.

It is an arithmetic number, because the mean of its divisors is an integer number (50424062923458).

Almost surely, 2^{201010210021111} is an apocalyptic number.

201010210021111 is a deficient number, since it is larger than the sum of its proper divisors (686041672721).

201010210021111 is an equidigital number, since it uses as much as digits as its factorization.

201010210021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686041672720.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201010210021111 its reverse (111120012010102), we get a palindrome (312130222031213).

The spelling of 201010210021111 in words is "two hundred one trillion, ten billion, two hundred ten million, twenty-one thousand, one hundred eleven".