123213031111 has 8 divisors (see below), whose sum is σ = 123606102464. Its totient is φ = 122820122880.

The previous prime is 123213031099. The next prime is 123213031157. The reversal of 123213031111 is 111130312321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123213031111 - 2²⁹ = 122676160199 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 (123213031181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1573651 + ... + 1650091.

It is an arithmetic number, because the mean of its divisors is an integer number (15450762808).

Almost surely, 2^123213031111 is an apocalyptic number.

123213031111 is a deficient number, since it is larger than the sum of its proper divisors (393071353).

123213031111 is an equidigital number, since it uses as much as digits as its factorization.

123213031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81561.

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

Adding to 123213031111 its reverse (111130312321), we get a palindrome (234343343432).

The spelling of 123213031111 in words is "one hundred twenty-three billion, two hundred thirteen million, thirty-one thousand, one hundred eleven".