123132111001 has 4 divisors (see below), whose sum is σ = 130375176372. Its totient is φ = 115889045632.

The previous prime is 123132110951. The next prime is 123132111007. The reversal of 123132111001 is 100111231321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39567177225 + 83564933776 = 198915^2 + 289076^2 .

It is a cyclic number.

It is not a de Polignac number, because 123132111001 - 2⁷ = 123132110873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123132111007) 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, 3621532660 + ... + 3621532693.

It is an arithmetic number, because the mean of its divisors is an integer number (32593794093).

Almost surely, 2^123132111001 is an apocalyptic number.

It is an amenable number.

123132111001 is a deficient number, since it is larger than the sum of its proper divisors (7243065371).

123132111001 is an equidigital number, since it uses as much as digits as its factorization.

123132111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7243065370.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 123132111001 its reverse (100111231321), we get a palindrome (223243342322).

The spelling of 123132111001 in words is "one hundred twenty-three billion, one hundred thirty-two million, one hundred eleven thousand, one".