201121020211 has 4 divisors (see below), whose sum is σ = 201136165624. Its totient is φ = 201105874800.

The previous prime is 201121020109. The next prime is 201121020227. The reversal of 201121020211 is 112020121102.

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 201121020211 - 2¹⁵ = 201120987443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121020191 and 201121020200.

It is not an unprimeable number, because it can be changed into a prime (201121020241) 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, 7552770 + ... + 7579351.

It is an arithmetic number, because the mean of its divisors is an integer number (50284041406).

Almost surely, 2^201121020211 is an apocalyptic number.

201121020211 is a deficient number, since it is larger than the sum of its proper divisors (15145413).

201121020211 is a wasteful number, since it uses less digits than its factorization.

201121020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15145412.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201121020211 its reverse (112020121102), we get a palindrome (313141141313).

The spelling of 201121020211 in words is "two hundred one billion, one hundred twenty-one million, twenty thousand, two hundred eleven".