20131002111 has 32 divisors (see below), whose sum is σ = 29745999360. Its totient is φ = 12007654400.

The previous prime is 20131002097. The next prime is 20131002139. The reversal of 20131002111 is 11120013102.

It is a cyclic number.

It is not a de Polignac number, because 20131002111 - 2⁵ = 20131002079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131002811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1382155 + ... + 1396643.

It is an arithmetic number, because the mean of its divisors is an integer number (929562480).

Almost surely, 2^20131002111 is an apocalyptic number.

20131002111 is a deficient number, since it is larger than the sum of its proper divisors (9614997249).

20131002111 is a wasteful number, since it uses less digits than its factorization.

20131002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167.

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

Adding to 20131002111 its reverse (11120013102), we get a palindrome (31251015213).

The spelling of 20131002111 in words is "twenty billion, one hundred thirty-one million, two thousand, one hundred eleven".