11011231201051 has 4 divisors (see below), whose sum is σ = 11011239783400. Its totient is φ = 11011222618704.

The previous prime is 11011231200967. The next prime is 11011231201127. The reversal of 11011231201051 is 15010213211011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011231201051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011231202051) 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, 1935666 + ... + 5076343.

It is an arithmetic number, because the mean of its divisors is an integer number (2752809945850).

Almost surely, 2^{11011231201051} is an apocalyptic number.

11011231201051 is a deficient number, since it is larger than the sum of its proper divisors (8582349).

11011231201051 is an equidigital number, since it uses as much as digits as its factorization.

11011231201051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582348.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 11011231201051 its reverse (15010213211011), we get a palindrome (26021444412062).

The spelling of 11011231201051 in words is "eleven trillion, eleven billion, two hundred thirty-one million, two hundred one thousand, fifty-one".