11212151135 has 4 divisors (see below), whose sum is σ = 13454581368. Its totient is φ = 8969720904.

The previous prime is 11212151131. The next prime is 11212151179. The reversal of 11212151135 is 53115121211.

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 11212151135 - 2² = 11212151131 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 11212151135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212151131) 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, 1121215109 + ... + 1121215118.

It is an arithmetic number, because the mean of its divisors is an integer number (3363645342).

Almost surely, 2^11212151135 is an apocalyptic number.

11212151135 is a deficient number, since it is larger than the sum of its proper divisors (2242430233).

11212151135 is an equidigital number, since it uses as much as digits as its factorization.

11212151135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242430232.

The product of its digits is 300, while the sum is 23.

Adding to 11212151135 its reverse (53115121211), we get a palindrome (64327272346).

The spelling of 11212151135 in words is "eleven billion, two hundred twelve million, one hundred fifty-one thousand, one hundred thirty-five".