201021022120111 has 4 divisors (see below), whose sum is σ = 201022354886272. Its totient is φ = 201019689353952.

The previous prime is 201021022120073. The next prime is 201021022120133. The reversal of 201021022120111 is 111021220120102.

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 201021022120111 - 2²⁵ = 201020988565679 is a prime.

It is a super-2 number, since 2×201021022120111² (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 (201021022120141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666156810 + ... + 666458503.

It is an arithmetic number, because the mean of its divisors is an integer number (50255588721568).

Almost surely, 2^{201021022120111} is an apocalyptic number.

201021022120111 is a deficient number, since it is larger than the sum of its proper divisors (1332766161).

201021022120111 is a wasteful number, since it uses less digits than its factorization.

201021022120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332766160.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201021022120111 its reverse (111021220120102), we get a palindrome (312042242240213).

The spelling of 201021022120111 in words is "two hundred one trillion, twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred eleven".