201211121101 has 4 divisors (see below), whose sum is σ = 205492208832. Its totient is φ = 196930033372.

The previous prime is 201211121081. The next prime is 201211121113. The reversal of 201211121101 is 101121112102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201211121101 - 2⁹ = 201211120589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211121401) 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, 2140543795 + ... + 2140543888.

It is an arithmetic number, because the mean of its divisors is an integer number (51373052208).

Almost surely, 2^201211121101 is an apocalyptic number.

It is an amenable number.

201211121101 is a deficient number, since it is larger than the sum of its proper divisors (4281087731).

201211121101 is an equidigital number, since it uses as much as digits as its factorization.

201211121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281087730.

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

Adding to 201211121101 its reverse (101121112102), we get a palindrome (302332233203).

The spelling of 201211121101 in words is "two hundred one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred one".