123121031001 has 4 divisors (see below), whose sum is σ = 164161374672. Its totient is φ = 82080687332.

The previous prime is 123121030993. The next prime is 123121031017. The reversal of 123121031001 is 100130121321.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 123121031001 - 2³ = 123121030993 is a prime.

It is a super-3 number, since 3×123121031001³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (123121031051) 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, 20520171831 + ... + 20520171836.

It is an arithmetic number, because the mean of its divisors is an integer number (41040343668).

Almost surely, 2^123121031001 is an apocalyptic number.

It is an amenable number.

123121031001 is a deficient number, since it is larger than the sum of its proper divisors (41040343671).

123121031001 is an equidigital number, since it uses as much as digits as its factorization.

123121031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41040343670.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 123121031001 its reverse (100130121321), we get a palindrome (223251152322).

The spelling of 123121031001 in words is "one hundred twenty-three billion, one hundred twenty-one million, thirty-one thousand, one".