215611101120011 has 4 divisors (see below), whose sum is σ = 215611162800000. Its totient is φ = 215611039440024.

The previous prime is 215611101120007. The next prime is 215611101120047. The reversal of 215611101120011 is 110021101116512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215611101120011 - 2² = 215611101120007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215611101120061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25259996 + ... + 32699993.

It is an arithmetic number, because the mean of its divisors is an integer number (53902790700000).

Almost surely, 2^{215611101120011} is an apocalyptic number.

215611101120011 is a deficient number, since it is larger than the sum of its proper divisors (61679989).

215611101120011 is an equidigital number, since it uses as much as digits as its factorization.

215611101120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61679988.

The product of its (nonzero) digits is 120, while the sum is 23.

Adding to 215611101120011 its reverse (110021101116512), we get a palindrome (325632202236523).

The spelling of 215611101120011 in words is "two hundred fifteen trillion, six hundred eleven billion, one hundred one million, one hundred twenty thousand, eleven".