43121202221 has 8 divisors (see below), whose sum is σ = 45392882400. Its totient is φ = 40849736400.

The previous prime is 43121202169. The next prime is 43121202227. The reversal of 43121202221 is 12220212134.

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 43121202221 - 2¹⁰ = 43121201197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43121202193 and 43121202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121202227) 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, 513071 + ... + 591171.

It is an arithmetic number, because the mean of its divisors is an integer number (5674110300).

Almost surely, 2^43121202221 is an apocalyptic number.

It is an amenable number.

43121202221 is a deficient number, since it is larger than the sum of its proper divisors (2271680179).

43121202221 is a wasteful number, since it uses less digits than its factorization.

43121202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107179.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 43121202221 its reverse (12220212134), we get a palindrome (55341414355).

The spelling of 43121202221 in words is "forty-three billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".