123211231001 has 4 divisors (see below), whose sum is σ = 123361306404. Its totient is φ = 123061155600.

The previous prime is 123211230949. The next prime is 123211231043. The reversal of 123211231001 is 100132112321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100132112321 = 219371 ⋅456451.

It can be written as a sum of positive squares in 2 ways, for example, as 15987073600 + 107224157401 = 126440^2 + 327451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123211231001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123211233001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75036470 + ... + 75038111.

It is an arithmetic number, because the mean of its divisors is an integer number (30840326601).

Almost surely, 2^123211231001 is an apocalyptic number.

It is an amenable number.

123211231001 is a deficient number, since it is larger than the sum of its proper divisors (150075403).

123211231001 is an equidigital number, since it uses as much as digits as its factorization.

123211231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150075402.

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

Adding to 123211231001 its reverse (100132112321), we get a palindrome (223343343322).

The spelling of 123211231001 in words is "one hundred twenty-three billion, two hundred eleven million, two hundred thirty-one thousand, one".