221220441420412 has 96 divisors (see below), whose sum is σ = 449357110272000. Its totient is φ = 93336101591040.

The previous prime is 221220441420397. The next prime is 221220441420413. The reversal of 221220441420412 is 214024144022122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220441420413) 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, 4145861389 + ... + 4145914747.

It is an arithmetic number, because the mean of its divisors is an integer number (4680803232000).

Almost surely, 2^{221220441420412} is an apocalyptic number.

It is an amenable number.

221220441420412 is an abundant number, since it is smaller than the sum of its proper divisors (228136668851588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221220441420412 is a wasteful number, since it uses less digits than its factorization.

221220441420412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60659 (or 60657 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 31.

Adding to 221220441420412 its reverse (214024144022122), we get a palindrome (435244585442534).

The spelling of 221220441420412 in words is "two hundred twenty-one trillion, two hundred twenty billion, four hundred forty-one million, four hundred twenty thousand, four hundred twelve".