11031122421 has 18 divisors (see below), whose sum is σ = 17514061110. Its totient is φ = 6685528080.

The previous prime is 11031122407. The next prime is 11031122461. The reversal of 11031122421 is 12422113011.

11031122421 is a `hidden beast` number, since 110 + 311 + 2 + 242 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10431558225 + 599564196 = 102135^2 + 24486^2 .

It is not a de Polignac number, because 11031122421 - 2⁹ = 11031121909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11031122394 and 11031122403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031122461) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5063706 + ... + 5065883.

It is an arithmetic number, because the mean of its divisors is an integer number (973003395).

Almost surely, 2^11031122421 is an apocalyptic number.

11031122421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11031122421 is a deficient number, since it is larger than the sum of its proper divisors (6482938689).

11031122421 is a wasteful number, since it uses less digits than its factorization.

11031122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10129617 (or 10129603 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11031122421 its reverse (12422113011), we get a palindrome (23453235432).

The spelling of 11031122421 in words is "eleven billion, thirty-one million, one hundred twenty-two thousand, four hundred twenty-one".