20312111102 has 4 divisors (see below), whose sum is σ = 30468166656. Its totient is φ = 10156055550.

The previous prime is 20312111093. The next prime is 20312111123. The reversal of 20312111102 is 20111121302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078027774 + ... + 5078027777.

It is an arithmetic number, because the mean of its divisors is an integer number (7617041664).

Almost surely, 2^20312111102 is an apocalyptic number.

20312111102 is a deficient number, since it is larger than the sum of its proper divisors (10156055554).

20312111102 is a wasteful number, since it uses less digits than its factorization.

20312111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156055553.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20312111102 its reverse (20111121302), we get a palindrome (40423232404).

The spelling of 20312111102 in words is "twenty billion, three hundred twelve million, one hundred eleven thousand, one hundred two".