201111121221123 has 32 divisors (see below), whose sum is σ = 278724914366976. Its totient is φ = 128873452578048.

The previous prime is 201111121221089. The next prime is 201111121221169. The reversal of 201111121221123 is 321122121111102.

201111121221123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201111121221123 - 2¹⁶ = 201111121155587 is a prime.

It is a super-2 number, since 2×201111121221123² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201111121221123.

It is not an unprimeable number, because it can be changed into a prime (201111121223123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229454586 + ... + 230329392.

It is an arithmetic number, because the mean of its divisors is an integer number (8710153573968).

Almost surely, 2^{201111121221123} is an apocalyptic number.

201111121221123 is a deficient number, since it is larger than the sum of its proper divisors (77613793145853).

201111121221123 is a wasteful number, since it uses less digits than its factorization.

201111121221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899883.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 201111121221123 its reverse (321122121111102), we get a palindrome (522233242332225).

The spelling of 201111121221123 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".