221035412609 has 8 divisors (see below), whose sum is σ = 241482593952. Its totient is φ = 200647073440.

The previous prime is 221035412551. The next prime is 221035412621. The reversal of 221035412609 is 906214530122.

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

It is a de Polignac number, because none of the positive numbers 2^k-221035412609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221035412639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14702684 + ... + 14717709.

It is an arithmetic number, because the mean of its divisors is an integer number (30185324244).

Almost surely, 2^221035412609 is an apocalyptic number.

It is an amenable number.

221035412609 is a deficient number, since it is larger than the sum of its proper divisors (20447181343).

221035412609 is a wasteful number, since it uses less digits than its factorization.

221035412609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29421087.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 221035412609 in words is "two hundred twenty-one billion, thirty-five million, four hundred twelve thousand, six hundred nine".