123211331011 has 4 divisors (see below), whose sum is σ = 123250610952. Its totient is φ = 123172051072.

The previous prime is 123211331003. The next prime is 123211331021. The reversal of 123211331011 is 110133112321.

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 123211331011 - 2³ = 123211331003 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 123211331011.

It is not an unprimeable number, because it can be changed into a prime (123211331021) 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, 19635265 + ... + 19641538.

It is an arithmetic number, because the mean of its divisors is an integer number (30812652738).

Almost surely, 2^123211331011 is an apocalyptic number.

123211331011 is a deficient number, since it is larger than the sum of its proper divisors (39279941).

123211331011 is an equidigital number, since it uses as much as digits as its factorization.

123211331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39279940.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123211331011 its reverse (110133112321), we get a palindrome (233344443332).

The spelling of 123211331011 in words is "one hundred twenty-three billion, two hundred eleven million, three hundred thirty-one thousand, eleven".