13540220111 has 16 divisors (see below), whose sum is σ = 15147101088. Its totient is φ = 11996620800.

The previous prime is 13540220107. The next prime is 13540220117. The reversal of 13540220111 is 11102204531.

It is a cyclic number.

It is not a de Polignac number, because 13540220111 - 2² = 13540220107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540220117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434591 + ... + 464703.

It is an arithmetic number, because the mean of its divisors is an integer number (946693818).

Almost surely, 2^13540220111 is an apocalyptic number.

13540220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13540220111 is a deficient number, since it is larger than the sum of its proper divisors (1606880977).

13540220111 is a wasteful number, since it uses less digits than its factorization.

13540220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31162.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 13540220111 its reverse (11102204531), we get a palindrome (24642424642).

The spelling of 13540220111 in words is "thirteen billion, five hundred forty million, two hundred twenty thousand, one hundred eleven".