221020320302123 has 8 divisors (see below), whose sum is σ = 222366744966240. Its totient is φ = 219674168848960.

The previous prime is 221020320302101. The next prime is 221020320302209. The reversal of 221020320302123 is 321203023020122.

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 221020320302123 - 2³² = 221016025334827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020320302323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66679748 + ... + 69915873.

It is an arithmetic number, because the mean of its divisors is an integer number (27795843120780).

Almost surely, 2^{221020320302123} is an apocalyptic number.

221020320302123 is a deficient number, since it is larger than the sum of its proper divisors (1346424664117).

221020320302123 is a wasteful number, since it uses less digits than its factorization.

221020320302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136605477.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221020320302123 its reverse (321203023020122), we get a palindrome (542223343322245).

The spelling of 221020320302123 in words is "two hundred twenty-one trillion, twenty billion, three hundred twenty million, three hundred two thousand, one hundred twenty-three".