221221424040132 has 12 divisors (see below), whose sum is σ = 516183322760336. Its totient is φ = 73740474680040.

The previous prime is 221221424040079. The next prime is 221221424040151. The reversal of 221221424040132 is 231040424122122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 221221424040132.

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, 9217559334994 + ... + 9217559335017.

Almost surely, 2^{221221424040132} is an apocalyptic number.

It is an amenable number.

221221424040132 is an abundant number, since it is smaller than the sum of its proper divisors (294961898720204).

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

221221424040132 is a wasteful number, since it uses less digits than its factorization.

221221424040132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18435118670018 (or 18435118670016 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 221221424040132 its reverse (231040424122122), we get a palindrome (452261848162254).

The spelling of 221221424040132 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred twenty-four million, forty thousand, one hundred thirty-two".