221422712460477 has 16 divisors (see below), whose sum is σ = 333175241321280. Its totient is φ = 129568149401600.

The previous prime is 221422712460449. The next prime is 221422712460589. The reversal of 221422712460477 is 774064217224122.

It is a cyclic number.

It is not a de Polignac number, because 221422712460477 - 2²³ = 221422704071869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422712460437) 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, 115685846724 + ... + 115685848637.

It is an arithmetic number, because the mean of its divisors is an integer number (20823452582580).

Almost surely, 2^{221422712460477} is an apocalyptic number.

It is an amenable number.

221422712460477 is a deficient number, since it is larger than the sum of its proper divisors (111752528860803).

221422712460477 is a wasteful number, since it uses less digits than its factorization.

221422712460477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231371695404.

The product of its (nonzero) digits is 4214784, while the sum is 51.

Adding to 221422712460477 its reverse (774064217224122), we get a palindrome (995486929684599).

The spelling of 221422712460477 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, seven hundred twelve million, four hundred sixty thousand, four hundred seventy-seven".