123012321011 has 4 divisors (see below), whose sum is σ = 130248339912. Its totient is φ = 115776302112.

The previous prime is 123012321001. The next prime is 123012321013. The reversal of 123012321011 is 110123210321.

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 123012321011 - 2⁶ = 123012320947 is a prime.

It is a super-2 number, since 2×123012321011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7236018883 = 123012321011 / (1 + 2 + 3 + 0 + 1 + 2 + 3 + 2 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123012321013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3618009425 + ... + 3618009458.

It is an arithmetic number, because the mean of its divisors is an integer number (32562084978).

Almost surely, 2^123012321011 is an apocalyptic number.

123012321011 is a deficient number, since it is larger than the sum of its proper divisors (7236018901).

123012321011 is an equidigital number, since it uses as much as digits as its factorization.

123012321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236018900.

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

Adding to 123012321011 its reverse (110123210321), we get a palindrome (233135531332).

The spelling of 123012321011 in words is "one hundred twenty-three billion, twelve million, three hundred twenty-one thousand, eleven".