11211122051 has 4 divisors (see below), whose sum is σ = 11254745352. Its totient is φ = 11167498752.

The previous prime is 11211122033. The next prime is 11211122057. The reversal of 11211122051 is 15022111211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15022111211 = 179 ⋅83922409.

It is a cyclic number.

It is not a de Polignac number, because 11211122051 - 2²⁶ = 11144013187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211122057) 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, 21811265 + ... + 21811778.

It is an arithmetic number, because the mean of its divisors is an integer number (2813686338).

Almost surely, 2^11211122051 is an apocalyptic number.

11211122051 is a deficient number, since it is larger than the sum of its proper divisors (43623301).

11211122051 is an equidigital number, since it uses as much as digits as its factorization.

11211122051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43623300.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 11211122051 its reverse (15022111211), we get a palindrome (26233233262).

The spelling of 11211122051 in words is "eleven billion, two hundred eleven million, one hundred twenty-two thousand, fifty-one".