11221250421 has 16 divisors (see below), whose sum is σ = 15027884928. Its totient is φ = 7447756800.

The previous prime is 11221250371. The next prime is 11221250441. The reversal of 11221250421 is 12405212211.

It is not a de Polignac number, because 11221250421 - 2⁶ = 11221250357 is a prime.

It is a super-2 number, since 2×11221250421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221250441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2457981 + ... + 2462541.

It is an arithmetic number, because the mean of its divisors is an integer number (939242808).

Almost surely, 2^11221250421 is an apocalyptic number.

It is an amenable number.

11221250421 is a deficient number, since it is larger than the sum of its proper divisors (3806634507).

11221250421 is a wasteful number, since it uses less digits than its factorization.

11221250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 11221250421 its reverse (12405212211), we get a palindrome (23626462632).

The spelling of 11221250421 in words is "eleven billion, two hundred twenty-one million, two hundred fifty thousand, four hundred twenty-one".