201021220111011 has 32 divisors (see below), whose sum is σ = 282819862241280. Its totient is φ = 126652666154400.

The previous prime is 201021220111003. The next prime is 201021220111031. The reversal of 201021220111011 is 110111022120102.

It is a happy number.

It is not a de Polignac number, because 201021220111011 - 2³ = 201021220111003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201021220111031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232045176 + ... + 232909866.

It is an arithmetic number, because the mean of its divisors is an integer number (8838120695040).

Almost surely, 2^{201021220111011} is an apocalyptic number.

201021220111011 is a deficient number, since it is larger than the sum of its proper divisors (81798642130269).

201021220111011 is a wasteful number, since it uses less digits than its factorization.

201021220111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874607.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201021220111011 its reverse (110111022120102), we get a palindrome (311132242231113).

The spelling of 201021220111011 in words is "two hundred one trillion, twenty-one billion, two hundred twenty million, one hundred eleven thousand, eleven".