43331431121221 has 32 divisors (see below), whose sum is σ = 49613543280000. Its totient is φ = 37581869832192.

The previous prime is 43331431121213. The next prime is 43331431121239. The reversal of 43331431121221 is 12212113413334.

It is a cyclic number.

It is not a de Polignac number, because 43331431121221 - 2³ = 43331431121213 is a prime.

It is a super-2 number, since 2×43331431121221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43331431121291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44683105 + ... + 45642553.

It is an arithmetic number, because the mean of its divisors is an integer number (1550423227500).

Almost surely, 2^{43331431121221} is an apocalyptic number.

It is an amenable number.

43331431121221 is a deficient number, since it is larger than the sum of its proper divisors (6282112158779).

43331431121221 is a wasteful number, since it uses less digits than its factorization.

43331431121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963301.

The product of its digits is 10368, while the sum is 31.

Adding to 43331431121221 its reverse (12212113413334), we get a palindrome (55543544534555).

The spelling of 43331431121221 in words is "forty-three trillion, three hundred thirty-one billion, four hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-one".