201220101011 has 4 divisors (see below), whose sum is σ = 201221124624. Its totient is φ = 201219077400.

The previous prime is 201220100999. The next prime is 201220101013. The reversal of 201220101011 is 110101022102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201220101011 - 2¹⁸ = 201219838867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220100983 and 201220101001.

It is not an unprimeable number, because it can be changed into a prime (201220101013) 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, 113735 + ... + 644496.

It is an arithmetic number, because the mean of its divisors is an integer number (50305281156).

Almost surely, 2^201220101011 is an apocalyptic number.

201220101011 is a deficient number, since it is larger than the sum of its proper divisors (1023613).

201220101011 is an equidigital number, since it uses as much as digits as its factorization.

201220101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023612.

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

Adding to 201220101011 its reverse (110101022102), we get a palindrome (311321123113).

The spelling of 201220101011 in words is "two hundred one billion, two hundred twenty million, one hundred one thousand, eleven".