201220010021111 has 4 divisors (see below), whose sum is σ = 201220050721824. Its totient is φ = 201219969320400.

The previous prime is 201220010021057. The next prime is 201220010021137. The reversal of 201220010021111 is 111120010022102.

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 201220010021111 - 2⁴⁶ = 130851265843447 is a prime.

It is a super-2 number, since 2×201220010021111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220010021141) 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 3 ways as a sum of consecutive naturals, for example, 11712335 + ... + 23229696.

It is an arithmetic number, because the mean of its divisors is an integer number (50305012680456).

Almost surely, 2^{201220010021111} is an apocalyptic number.

201220010021111 is a deficient number, since it is larger than the sum of its proper divisors (40700713).

201220010021111 is an equidigital number, since it uses as much as digits as its factorization.

201220010021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40700712.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201220010021111 its reverse (111120010022102), we get a palindrome (312340020043213).

Subtracting from 201220010021111 its reverse (111120010022102), we obtain a palindrome (90099999999009).

The spelling of 201220010021111 in words is "two hundred one trillion, two hundred twenty billion, ten million, twenty-one thousand, one hundred eleven".