20120013111 has 64 divisors (see below), whose sum is σ = 32090812416. Its totient is φ = 11070259200.

The previous prime is 20120013091. The next prime is 20120013127. The reversal of 20120013111 is 11131002102.

It is not a de Polignac number, because 20120013111 - 2⁹ = 20120012599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120013181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5859051 + ... + 5862483.

It is an arithmetic number, because the mean of its divisors is an integer number (501418944).

Almost surely, 2^20120013111 is an apocalyptic number.

20120013111 is a deficient number, since it is larger than the sum of its proper divisors (11970799305).

20120013111 is a wasteful number, since it uses less digits than its factorization.

20120013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832.

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

Adding to 20120013111 its reverse (11131002102), we get a palindrome (31251015213).

The spelling of 20120013111 in words is "twenty billion, one hundred twenty million, thirteen thousand, one hundred eleven".