221646326010422 has 4 divisors (see below), whose sum is σ = 332469489015636. Its totient is φ = 110823163005210.

The previous prime is 221646326010419. The next prime is 221646326010533. The reversal of 221646326010422 is 224010623646122.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221646326010422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55411581502604 + ... + 55411581502607.

It is an arithmetic number, because the mean of its divisors is an integer number (83117372253909).

Almost surely, 2^{221646326010422} is an apocalyptic number.

221646326010422 is a deficient number, since it is larger than the sum of its proper divisors (110823163005214).

221646326010422 is a wasteful number, since it uses less digits than its factorization.

221646326010422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110823163005213.

The product of its (nonzero) digits is 331776, while the sum is 41.

Adding to 221646326010422 its reverse (224010623646122), we get a palindrome (445656949656544).

The spelling of 221646326010422 in words is "two hundred twenty-one trillion, six hundred forty-six billion, three hundred twenty-six million, ten thousand, four hundred twenty-two".