201000122111 has 4 divisors (see below), whose sum is σ = 201885585432. Its totient is φ = 200114658792.

The previous prime is 201000122107. The next prime is 201000122131. The reversal of 201000122111 is 111221000102.

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 201000122111 - 2² = 201000122107 is a prime.

It is a super-2 number, since 2×201000122111² (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 = 201000122092 and 201000122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000122101) 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, 442731320 + ... + 442731773.

It is an arithmetic number, because the mean of its divisors is an integer number (50471396358).

Almost surely, 2^201000122111 is an apocalyptic number.

201000122111 is a deficient number, since it is larger than the sum of its proper divisors (885463321).

201000122111 is an equidigital number, since it uses as much as digits as its factorization.

201000122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885463320.

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

Adding to 201000122111 its reverse (111221000102), we get a palindrome (312221122213).

The spelling of 201000122111 in words is "two hundred one billion, one hundred twenty-two thousand, one hundred eleven".