201012221211111 has 36 divisors (see below), whose sum is σ = 301689027217864. Its totient is φ = 133925470340400.

The previous prime is 201012221211077. The next prime is 201012221211161. The reversal of 201012221211111 is 111112122210102.

It is a happy number.

201012221211111 is a `hidden beast` number, since 20 + 101 + 2 + 221 + 211 + 111 = 666.

It is not a de Polignac number, because 201012221211111 - 2⁶ = 201012221211047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012221211161) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1185216 + ... + 20085546.

Almost surely, 2^{201012221211111} is an apocalyptic number.

201012221211111 is a deficient number, since it is larger than the sum of its proper divisors (100676806006753).

201012221211111 is an frugal number, since it uses more digits than its factorization.

201012221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18901976 (or 18901955 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 201012221211111 its reverse (111112122210102), we get a palindrome (312124343421213).

The spelling of 201012221211111 in words is "two hundred one trillion, twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".