20131231110002 has 4 divisors (see below), whose sum is σ = 30196846665006. Its totient is φ = 10065615555000.

The previous prime is 20131231109963. The next prime is 20131231110043. The reversal of 20131231110002 is 20001113213102.

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

It can be written as a sum of positive squares in only one way, i.e., 16203933718921 + 3927297391081 = 4025411^2 + 1981741^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032807777499 + ... + 5032807777502.

Almost surely, 2^{20131231110002} is an apocalyptic number.

20131231110002 is a deficient number, since it is larger than the sum of its proper divisors (10065615555004).

20131231110002 is a wasteful number, since it uses less digits than its factorization.

20131231110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065615555003.

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

Adding to 20131231110002 its reverse (20001113213102), we get a palindrome (40132344323104).

The spelling of 20131231110002 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, two".