221222402141 has 4 divisors (see below), whose sum is σ = 238239510012. Its totient is φ = 204205294272.

The previous prime is 221222402087. The next prime is 221222402183. The reversal of 221222402141 is 141204222122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119148542041 + 102073860100 = 345179^2 + 319490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222402141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222302141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8508553916 + ... + 8508553941.

It is an arithmetic number, because the mean of its divisors is an integer number (59559877503).

Almost surely, 2^221222402141 is an apocalyptic number.

It is an amenable number.

221222402141 is a deficient number, since it is larger than the sum of its proper divisors (17017107871).

221222402141 is a wasteful number, since it uses less digits than its factorization.

221222402141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17017107870.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221222402141 its reverse (141204222122), we get a palindrome (362426624263).

The spelling of 221222402141 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred two thousand, one hundred forty-one".