123012023011 has 4 divisors (see below), whose sum is σ = 123171987400. Its totient is φ = 122852058624.

The previous prime is 123012022961. The next prime is 123012023047. The reversal of 123012023011 is 110320210321.

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 123012023011 - 2¹⁹ = 123011498723 is a prime.

It is a super-2 number, since 2×123012023011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123012723011) 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, 79981041 + ... + 79982578.

It is an arithmetic number, because the mean of its divisors is an integer number (30792996850).

Almost surely, 2^123012023011 is an apocalyptic number.

123012023011 is a deficient number, since it is larger than the sum of its proper divisors (159964389).

123012023011 is an equidigital number, since it uses as much as digits as its factorization.

123012023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159964388.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123012023011 its reverse (110320210321), we get a palindrome (233332233332).

The spelling of 123012023011 in words is "one hundred twenty-three billion, twelve million, twenty-three thousand, eleven".