123011001021001 has 4 divisors (see below), whose sum is σ = 123081413730832. Its totient is φ = 122940588311172.

The previous prime is 123011001020987. The next prime is 123011001021017. The reversal of 123011001021001 is 100120100110321.

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 123011001021001 - 2⁹ = 123011001020489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123011001027001) 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, 35206352295 + ... + 35206355788.

It is an arithmetic number, because the mean of its divisors is an integer number (30770353432708).

Almost surely, 2^{123011001021001} is an apocalyptic number.

It is an amenable number.

123011001021001 is a deficient number, since it is larger than the sum of its proper divisors (70412709831).

123011001021001 is an equidigital number, since it uses as much as digits as its factorization.

123011001021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70412709830.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 123011001021001 its reverse (100120100110321), we get a palindrome (223131101131322).

The spelling of 123011001021001 in words is "one hundred twenty-three trillion, eleven billion, one million, twenty-one thousand, one".