123112032011 has 4 divisors (see below), whose sum is σ = 123566320224. Its totient is φ = 122657743800.

The previous prime is 123112031981. The next prime is 123112032067. The reversal of 123112032011 is 110230211321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110230211321 = 1283 ⋅85915987.

It is a cyclic number.

It is not a de Polignac number, because 123112032011 - 2¹⁸ = 123111769867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123112032611) 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, 227143700 + ... + 227144241.

It is an arithmetic number, because the mean of its divisors is an integer number (30891580056).

Almost surely, 2^123112032011 is an apocalyptic number.

123112032011 is a deficient number, since it is larger than the sum of its proper divisors (454288213).

123112032011 is an equidigital number, since it uses as much as digits as its factorization.

123112032011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454288212.

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

Adding to 123112032011 its reverse (110230211321), we get a palindrome (233342243332).

The spelling of 123112032011 in words is "one hundred twenty-three billion, one hundred twelve million, thirty-two thousand, eleven".