206221211115242 has 8 divisors (see below), whose sum is σ = 309353784744132. Its totient is φ = 103103282867200.

The previous prime is 206221211115193. The next prime is 206221211115263. The reversal of 206221211115242 is 242511112122602.

It can be written as a sum of positive squares in 2 ways, for example, as 150216178825441 + 56005032289801 = 12256271^2 + 7483651^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 206221211115199 and 206221211115208.

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, 3661310009 + ... + 3661366332.

Almost surely, 2^{206221211115242} is an apocalyptic number.

206221211115242 is a deficient number, since it is larger than the sum of its proper divisors (103132573628890).

206221211115242 is a wasteful number, since it uses less digits than its factorization.

206221211115242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7322690424.

The product of its (nonzero) digits is 7680, while the sum is 32.

Adding to 206221211115242 its reverse (242511112122602), we get a palindrome (448732323237844).

The spelling of 206221211115242 in words is "two hundred six trillion, two hundred twenty-one billion, two hundred eleven million, one hundred fifteen thousand, two hundred forty-two".