123011120213 has 4 divisors (see below), whose sum is σ = 123201246240. Its totient is φ = 122820994188.

The previous prime is 123011120191. The next prime is 123011120279. The reversal of 123011120213 is 312021110321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312021110321 = 130003 ⋅2400107.

It is a cyclic number.

It is not a de Polignac number, because 123011120213 - 2⁶ = 123011120149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011120191 and 123011120200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011120413) 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, 95062043 + ... + 95063336.

It is an arithmetic number, because the mean of its divisors is an integer number (30800311560).

Almost surely, 2^123011120213 is an apocalyptic number.

It is an amenable number.

123011120213 is a deficient number, since it is larger than the sum of its proper divisors (190126027).

123011120213 is an equidigital number, since it uses as much as digits as its factorization.

123011120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190126026.

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

Adding to 123011120213 its reverse (312021110321), we get a palindrome (435032230534).

The spelling of 123011120213 in words is "one hundred twenty-three billion, eleven million, one hundred twenty thousand, two hundred thirteen".