221060769242 has 4 divisors (see below), whose sum is σ = 331591153866. Its totient is φ = 110530384620.

The previous prime is 221060769211. The next prime is 221060769247. The reversal of 221060769242 is 242967060122.

It is a Cunningham number, because it is equal to 470171²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 221060769241 + 1 = 470171^2 + 1^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221060769242.

It is not an unprimeable number, because it can be changed into a prime (221060769247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55265192309 + ... + 55265192312.

Almost surely, 2^221060769242 is an apocalyptic number.

221060769242 is a deficient number, since it is larger than the sum of its proper divisors (110530384624).

221060769242 is a wasteful number, since it uses less digits than its factorization.

221060769242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110530384623.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 221060769242 in words is "two hundred twenty-one billion, sixty million, seven hundred sixty-nine thousand, two hundred forty-two".