15216213112111 has 16 divisors (see below), whose sum is σ = 16677588142080. Its totient is φ = 13767911831520.

The previous prime is 15216213112099. The next prime is 15216213112169. The reversal of 15216213112111 is 11121131261251.

It is not a de Polignac number, because 15216213112111 - 2³³ = 15207623177519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15216213112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15216213112811) 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, 3584746 + ... + 6578968.

It is an arithmetic number, because the mean of its divisors is an integer number (1042349258880).

Almost surely, 2^{15216213112111} is an apocalyptic number.

15216213112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15216213112111 is a deficient number, since it is larger than the sum of its proper divisors (1461375029969).

15216213112111 is a wasteful number, since it uses less digits than its factorization.

15216213112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996406.

The product of its digits is 720, while the sum is 28.

Adding to 15216213112111 its reverse (11121131261251), we get a palindrome (26337344373362).

The spelling of 15216213112111 in words is "fifteen trillion, two hundred sixteen billion, two hundred thirteen million, one hundred twelve thousand, one hundred eleven".