201031223111 has 4 divisors (see below), whose sum is σ = 201032125824. Its totient is φ = 201030320400.

The previous prime is 201031223069. The next prime is 201031223179. The reversal of 201031223111 is 111322130102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 111322130102 = 2 ⋅55661065051.

It is a cyclic number.

It is not a de Polignac number, because 201031223111 - 2³⁴ = 183851353927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201031223111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201031223311) 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, 147866 + ... + 651096.

It is an arithmetic number, because the mean of its divisors is an integer number (50258031456).

Almost surely, 2^201031223111 is an apocalyptic number.

201031223111 is a deficient number, since it is larger than the sum of its proper divisors (902713).

201031223111 is an equidigital number, since it uses as much as digits as its factorization.

201031223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902712.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 201031223111 its reverse (111322130102), we get a palindrome (312353353213).

The spelling of 201031223111 in words is "two hundred one billion, thirty-one million, two hundred twenty-three thousand, one hundred eleven".