221640356072722 has 8 divisors (see below), whose sum is σ = 333273396051900. Its totient is φ = 110549224055424.

The previous prime is 221640356072699. The next prime is 221640356072789. The reversal of 221640356072722 is 227270653046122.

It can be written as a sum of positive squares in 2 ways, for example, as 173967421088241 + 47672934984481 = 13189671^2 + 6904559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135476989447 + ... + 135476991082.

Almost surely, 2^{221640356072722} is an apocalyptic number.

221640356072722 is a deficient number, since it is larger than the sum of its proper divisors (111633039979178).

221640356072722 is a wasteful number, since it uses less digits than its factorization.

221640356072722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270953980940.

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 221640356072722 in words is "two hundred twenty-one trillion, six hundred forty billion, three hundred fifty-six million, seventy-two thousand, seven hundred twenty-two".