201101111220021 has 16 divisors (see below), whose sum is σ = 273672410806080. Its totient is φ = 131307469712640.

The previous prime is 201101111219999. The next prime is 201101111220041. The reversal of 201101111220021 is 120022111101102.

It is a happy number.

It is not a de Polignac number, because 201101111220021 - 2¹⁴ = 201101111203637 is a prime.

It is a super-2 number, since 2×201101111220021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101111220041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107428356 + ... + 1107609933.

It is an arithmetic number, because the mean of its divisors is an integer number (17104525675380).

Almost surely, 2^{201101111220021} is an apocalyptic number.

It is an amenable number.

201101111220021 is a deficient number, since it is larger than the sum of its proper divisors (72571299586059).

201101111220021 is a wasteful number, since it uses less digits than its factorization.

201101111220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215038916.

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

Adding to 201101111220021 its reverse (120022111101102), we get a palindrome (321123222321123).

The spelling of 201101111220021 in words is "two hundred one trillion, one hundred one billion, one hundred eleven million, two hundred twenty thousand, twenty-one".