201121020911 has 2 divisors, whose sum is σ = 201121020912. Its totient is φ = 201121020910.

The previous prime is 201121020887. The next prime is 201121021061. The reversal of 201121020911 is 119020121102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201121020911 - 2⁶ = 201121020847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121020011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560510455 + 100560510456.

It is an arithmetic number, because the mean of its divisors is an integer number (100560510456).

Almost surely, 2^201121020911 is an apocalyptic number.

201121020911 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121020911 is an equidigital number, since it uses as much as digits as its factorization.

201121020911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 201121020911 in words is "two hundred one billion, one hundred twenty-one million, twenty thousand, nine hundred eleven".