22131031443421 has 16 divisors (see below), whose sum is σ = 22713844236160. Its totient is φ = 21551353750080.

The previous prime is 22131031443359. The next prime is 22131031443461. The reversal of 22131031443421 is 12434413013122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22131031443421 - 2¹³ = 22131031435229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131031443461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49160011 + ... + 49608151.

It is an arithmetic number, because the mean of its divisors is an integer number (1419615264760).

Almost surely, 2^{22131031443421} is an apocalyptic number.

It is an amenable number.

22131031443421 is a deficient number, since it is larger than the sum of its proper divisors (582812792739).

22131031443421 is a wasteful number, since it uses less digits than its factorization.

22131031443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451636.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 22131031443421 its reverse (12434413013122), we get a palindrome (34565444456543).

The spelling of 22131031443421 in words is "twenty-two trillion, one hundred thirty-one billion, thirty-one million, four hundred forty-three thousand, four hundred twenty-one".