201220011011 has 4 divisors (see below), whose sum is σ = 203976449592. Its totient is φ = 198463572432.

The previous prime is 201220010987. The next prime is 201220011019. The reversal of 201220011011 is 110110022102.

201220011011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201220011011 - 2³⁰ = 200146269187 is a prime.

It is a super-2 number, since 2×201220011011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220010983 and 201220011001.

It is not an unprimeable number, because it can be changed into a prime (201220011019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378219181 + ... + 1378219326.

It is an arithmetic number, because the mean of its divisors is an integer number (50994112398).

Almost surely, 2^201220011011 is an apocalyptic number.

201220011011 is a deficient number, since it is larger than the sum of its proper divisors (2756438581).

201220011011 is an equidigital number, since it uses as much as digits as its factorization.

201220011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756438580.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201220011011 its reverse (110110022102), we get a palindrome (311330033113).

The spelling of 201220011011 in words is "two hundred one billion, two hundred twenty million, eleven thousand, eleven".