11211047651 has 4 divisors (see below), whose sum is σ = 11218588512. Its totient is φ = 11203506792.

The previous prime is 11211047567. The next prime is 11211047657. The reversal of 11211047651 is 15674011211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15674011211 = 44959 ⋅348629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211047651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211047657) 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, 3768200 + ... + 3771173.

It is an arithmetic number, because the mean of its divisors is an integer number (2804647128).

Almost surely, 2^11211047651 is an apocalyptic number.

11211047651 is a deficient number, since it is larger than the sum of its proper divisors (7540861).

11211047651 is an equidigital number, since it uses as much as digits as its factorization.

11211047651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540860.

The product of its (nonzero) digits is 1680, while the sum is 29.

Adding to 11211047651 its reverse (15674011211), we get a palindrome (26885058862).

The spelling of 11211047651 in words is "eleven billion, two hundred eleven million, forty-seven thousand, six hundred fifty-one".