11215108122667 has 4 divisors (see below), whose sum is σ = 11475924590680. Its totient is φ = 10954291654656.

The previous prime is 11215108122601. The next prime is 11215108122677. The reversal of 11215108122667 is 76622180151211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11215108122667 is a prime.

It is a super-2 number, since 2×11215108122667² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 260816467969 = 11215108122667 / (1 + 1 + 2 + 1 + 5 + 1 + 0 + 8 + 1 + 2 + 2 + 6 + 6 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11215108122677) 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, 130408233942 + ... + 130408234027.

It is an arithmetic number, because the mean of its divisors is an integer number (2868981147670).

Almost surely, 2^{11215108122667} is an apocalyptic number.

11215108122667 is a deficient number, since it is larger than the sum of its proper divisors (260816468013).

11215108122667 is an equidigital number, since it uses as much as digits as its factorization.

11215108122667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260816468012.

The product of its (nonzero) digits is 80640, while the sum is 43.

Adding to 11215108122667 its reverse (76622180151211), we get a palindrome (87837288273878).

The spelling of 11215108122667 in words is "eleven trillion, two hundred fifteen billion, one hundred eight million, one hundred twenty-two thousand, six hundred sixty-seven".