201011212111 has 4 divisors (see below), whose sum is σ = 201012230224. Its totient is φ = 201010194000.

The previous prime is 201011212067. The next prime is 201011212169. The reversal of 201011212111 is 111212110102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201011212111 - 2³³ = 192421277519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011212091 and 201011212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011212411) 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, 107115 + ... + 643036.

It is an arithmetic number, because the mean of its divisors is an integer number (50253057556).

Almost surely, 2^201011212111 is an apocalyptic number.

201011212111 is a deficient number, since it is larger than the sum of its proper divisors (1018113).

201011212111 is an equidigital number, since it uses as much as digits as its factorization.

201011212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018112.

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

Adding to 201011212111 its reverse (111212110102), we get a palindrome (312223322213).

The spelling of 201011212111 in words is "two hundred one billion, eleven million, two hundred twelve thousand, one hundred eleven".