123231201001 has 4 divisors (see below), whose sum is σ = 124451312004. Its totient is φ = 122011090000.

The previous prime is 123231200999. The next prime is 123231201083. The reversal of 123231201001 is 100102132321.

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 115395410601 + 7835790400 = 339699^2 + 88520^2 .

It is a cyclic number.

It is not a de Polignac number, because 123231201001 - 2¹ = 123231200999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123231201101) 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, 610055350 + ... + 610055551.

It is an arithmetic number, because the mean of its divisors is an integer number (31112828001).

Almost surely, 2^123231201001 is an apocalyptic number.

It is an amenable number.

123231201001 is a deficient number, since it is larger than the sum of its proper divisors (1220111003).

123231201001 is a wasteful number, since it uses less digits than its factorization.

123231201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220111002.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123231201001 its reverse (100102132321), we get a palindrome (223333333322).

The spelling of 123231201001 in words is "one hundred twenty-three billion, two hundred thirty-one million, two hundred one thousand, one".