221221421034132 has 96 divisors (see below), whose sum is σ = 526184467200000. Its totient is φ = 72317901648384.

The previous prime is 221221421034127. The next prime is 221221421034199. The reversal of 221221421034132 is 231430124122122.

It is a self number, because there is not a number n which added to its sum of digits gives 221221421034132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513418119 + ... + 513848817.

It is an arithmetic number, because the mean of its divisors is an integer number (5481088200000).

Almost surely, 2^{221221421034132} is an apocalyptic number.

It is an amenable number.

221221421034132 is an abundant number, since it is smaller than the sum of its proper divisors (304963046165868).

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

221221421034132 is a wasteful number, since it uses less digits than its factorization.

221221421034132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432493 (or 432491 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 221221421034132 its reverse (231430124122122), we get a palindrome (452651545156254).

The spelling of 221221421034132 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred twenty-one million, thirty-four thousand, one hundred thirty-two".