221260445642 has 4 divisors (see below), whose sum is σ = 331890668466. Its totient is φ = 110630222820.

The previous prime is 221260445641. The next prime is 221260445677. The reversal of 221260445642 is 246544062122.

221260445642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 120402754081 + 100857691561 = 346991^2 + 317581^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221260445596 and 221260445605.

It is not an unprimeable number, because it can be changed into a prime (221260445641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55315111409 + ... + 55315111412.

Almost surely, 2^221260445642 is an apocalyptic number.

221260445642 is a deficient number, since it is larger than the sum of its proper divisors (110630222824).

221260445642 is a wasteful number, since it uses less digits than its factorization.

221260445642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110630222823.

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 221260445642 in words is "two hundred twenty-one billion, two hundred sixty million, four hundred forty-five thousand, six hundred forty-two".