11221042421 has 8 divisors (see below), whose sum is σ = 11380906944. Its totient is φ = 11061228640.

The previous prime is 11221042373. The next prime is 11221042433. The reversal of 11221042421 is 12424012211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221042421 - 2²² = 11216848117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221042393 and 11221042402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221042451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791225 + ... + 805281.

It is an arithmetic number, because the mean of its divisors is an integer number (1422613368).

Almost surely, 2^11221042421 is an apocalyptic number.

It is an amenable number.

11221042421 is a deficient number, since it is larger than the sum of its proper divisors (159864523).

11221042421 is a wasteful number, since it uses less digits than its factorization.

11221042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25371.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11221042421 its reverse (12424012211), we get a palindrome (23645054632).

The spelling of 11221042421 in words is "eleven billion, two hundred twenty-one million, forty-two thousand, four hundred twenty-one".