221345251023 has 32 divisors (see below), whose sum is σ = 325278664704. Its totient is φ = 133042845312.

The previous prime is 221345251013. The next prime is 221345251063. The reversal of 221345251023 is 320152543122.

It is not a de Polignac number, because 221345251023 - 2²⁰ = 221344202447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221345251013) 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, 220840 + ... + 701042.

It is an arithmetic number, because the mean of its divisors is an integer number (10164958272).

Almost surely, 2^221345251023 is an apocalyptic number.

221345251023 is a deficient number, since it is larger than the sum of its proper divisors (103933413681).

221345251023 is a wasteful number, since it uses less digits than its factorization.

221345251023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480495.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 221345251023 its reverse (320152543122), we get a palindrome (541497794145).

The spelling of 221345251023 in words is "two hundred twenty-one billion, three hundred forty-five million, two hundred fifty-one thousand, twenty-three".