11421444220431 has 16 divisors (see below), whose sum is σ = 17404165219584. Its totient is φ = 6526517151744.

The previous prime is 11421444220349. The next prime is 11421444220451. The reversal of 11421444220431 is 13402244412411.

It is not a de Polignac number, because 11421444220431 - 2¹³ = 11421444212239 is a prime.

It is a super-2 number, since 2×11421444220431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11421444220392 and 11421444220401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421444220451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6832716 + ... + 8338398.

It is an arithmetic number, because the mean of its divisors is an integer number (1087760326224).

Almost surely, 2^{11421444220431} is an apocalyptic number.

11421444220431 is a deficient number, since it is larger than the sum of its proper divisors (5982720999153).

11421444220431 is a wasteful number, since it uses less digits than its factorization.

11421444220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866910.

The product of its (nonzero) digits is 24576, while the sum is 33.

Adding to 11421444220431 its reverse (13402244412411), we get a palindrome (24823688632842).

The spelling of 11421444220431 in words is "eleven trillion, four hundred twenty-one billion, four hundred forty-four million, two hundred twenty thousand, four hundred thirty-one".