221051142345 has 96 divisors (see below), whose sum is σ = 392352679296. Its totient is φ = 106266188160.

The previous prime is 221051142269. The next prime is 221051142371. The reversal of 221051142345 is 543241150122.

It is not a de Polignac number, because 221051142345 - 2³⁰ = 219977400521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 556803687 + ... + 556804083.

It is an arithmetic number, because the mean of its divisors is an integer number (4087007076).

Almost surely, 2^221051142345 is an apocalyptic number.

It is an amenable number.

221051142345 is a deficient number, since it is larger than the sum of its proper divisors (171301536951).

221051142345 is an equidigital number, since it uses as much as digits as its factorization.

221051142345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 221051142345 its reverse (543241150122), we get a palindrome (764292292467).

The spelling of 221051142345 in words is "two hundred twenty-one billion, fifty-one million, one hundred forty-two thousand, three hundred forty-five".