20121002013 has 32 divisors (see below), whose sum is σ = 31049044992. Its totient is φ = 11352211200.

The previous prime is 20121002009. The next prime is 20121002039. The reversal of 20121002013 is 31020012102.

It is not a de Polignac number, because 20121002013 - 2² = 20121002009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20121002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121002003) 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, 4409253 + ... + 4413813.

It is an arithmetic number, because the mean of its divisors is an integer number (970282656).

Almost surely, 2^20121002013 is an apocalyptic number.

It is an amenable number.

20121002013 is a deficient number, since it is larger than the sum of its proper divisors (10928042979).

20121002013 is a wasteful number, since it uses less digits than its factorization.

20121002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7185.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20121002013 its reverse (31020012102), we get a palindrome (51141014115).

The spelling of 20121002013 in words is "twenty billion, one hundred twenty-one million, two thousand, thirteen".