201011121211 has 4 divisors (see below), whose sum is σ = 201396939624. Its totient is φ = 200625302800.

The previous prime is 201011121173. The next prime is 201011121247. The reversal of 201011121211 is 112121110102.

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 201011121211 - 2⁷ = 201011121083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011121191 and 201011121200.

It is not an unprimeable number, because it can be changed into a prime (201011121611) 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, 192908425 + ... + 192909466.

It is an arithmetic number, because the mean of its divisors is an integer number (50349234906).

Almost surely, 2^201011121211 is an apocalyptic number.

201011121211 is a deficient number, since it is larger than the sum of its proper divisors (385818413).

201011121211 is an equidigital number, since it uses as much as digits as its factorization.

201011121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385818412.

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

Adding to 201011121211 its reverse (112121110102), we get a palindrome (313132231313).

The spelling of 201011121211 in words is "two hundred one billion, eleven million, one hundred twenty-one thousand, two hundred eleven".