11221100051 has 4 divisors (see below), whose sum is σ = 12824114352. Its totient is φ = 9618085752.

The previous prime is 11221100017. The next prime is 11221100069. The reversal of 11221100051 is 15000112211.

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 11221100051 - 2²⁶ = 11153991187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221099999 and 11221100035.

It is not an unprimeable number, because it can be changed into a prime (11221100081) 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, 801507140 + ... + 801507153.

It is an arithmetic number, because the mean of its divisors is an integer number (3206028588).

Almost surely, 2^11221100051 is an apocalyptic number.

11221100051 is a deficient number, since it is larger than the sum of its proper divisors (1603014301).

11221100051 is an equidigital number, since it uses as much as digits as its factorization.

11221100051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603014300.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 11221100051 its reverse (15000112211), we get a palindrome (26221212262).

The spelling of 11221100051 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, fifty-one".