221045042412 has 18 divisors (see below), whose sum is σ = 558752746188. Its totient is φ = 73681680792.

The previous prime is 221045042399. The next prime is 221045042443. The reversal of 221045042412 is 214240540122.

It is a happy number.

221045042412 is a `hidden beast` number, since 22 + 104 + 504 + 24 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3070069998 + ... + 3070070069.

Almost surely, 2^221045042412 is an apocalyptic number.

It is an amenable number.

221045042412 is an abundant number, since it is smaller than the sum of its proper divisors (337707703776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221045042412 is a wasteful number, since it uses less digits than its factorization.

221045042412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140140077 (or 6140140072 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 221045042412 its reverse (214240540122), we get a palindrome (435285582534).

The spelling of 221045042412 in words is "two hundred twenty-one billion, forty-five million, forty-two thousand, four hundred twelve".