221342115643 has 12 divisors (see below), whose sum is σ = 244384431424. Its totient is φ = 200317748400.

The previous prime is 221342115641. The next prime is 221342115661. The reversal of 221342115643 is 346511243122.

It is not a de Polignac number, because 221342115643 - 2¹ = 221342115641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221342115599 and 221342115608.

It is not an unprimeable number, because it can be changed into a prime (221342115641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4074528 + ... + 4128493.

Almost surely, 2^221342115643 is an apocalyptic number.

221342115643 is a deficient number, since it is larger than the sum of its proper divisors (23042315781).

221342115643 is a wasteful number, since it uses less digits than its factorization.

221342115643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8203266 (or 8203255 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

Adding to 221342115643 its reverse (346511243122), we get a palindrome (567853358765).

The spelling of 221342115643 in words is "two hundred twenty-one billion, three hundred forty-two million, one hundred fifteen thousand, six hundred forty-three".