123220202311 has 4 divisors (see below), whose sum is σ = 123253771824. Its totient is φ = 123186632800.

The previous prime is 123220202279. The next prime is 123220202327. The reversal of 123220202311 is 113202022321.

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 123220202311 - 2⁵ = 123220202279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220202381) 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, 16779250 + ... + 16786591.

It is an arithmetic number, because the mean of its divisors is an integer number (30813442956).

Almost surely, 2^123220202311 is an apocalyptic number.

123220202311 is a deficient number, since it is larger than the sum of its proper divisors (33569513).

123220202311 is an equidigital number, since it uses as much as digits as its factorization.

123220202311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33569512.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 123220202311 its reverse (113202022321), we get a palindrome (236422224632).

The spelling of 123220202311 in words is "one hundred twenty-three billion, two hundred twenty million, two hundred two thousand, three hundred eleven".