221321320320102 has 64 divisors (see below), whose sum is σ = 462429410420736. Its totient is φ = 70483510056960.

The previous prime is 221321320320101. The next prime is 221321320320103. The reversal of 221321320320102 is 201023023123122.

It is an interprime number because it is at equal distance from previous prime (221321320320101) and next prime (221321320320103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321320320101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1909975638 + ... + 1910091510.

It is an arithmetic number, because the mean of its divisors is an integer number (7225459537824).

Almost surely, 2^{221321320320102} is an apocalyptic number.

221321320320102 is an abundant number, since it is smaller than the sum of its proper divisors (241108090100634).

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

221321320320102 is a wasteful number, since it uses less digits than its factorization.

221321320320102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132005.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221321320320102 its reverse (201023023123122), we get a palindrome (422344343443224).

The spelling of 221321320320102 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, three hundred twenty million, three hundred twenty thousand, one hundred two".