221243032421012 has 24 divisors (see below), whose sum is σ = 442651356760704. Its totient is φ = 94783022769312.

The previous prime is 221243032421009. The next prime is 221243032421063. The reversal of 221243032421012 is 210124230342122.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1475744408 + ... + 1475894319.

It is an arithmetic number, because the mean of its divisors is an integer number (18443806531696).

Almost surely, 2^{221243032421012} is an apocalyptic number.

It is an amenable number.

221243032421012 is an abundant number, since it is smaller than the sum of its proper divisors (221408324339692).

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

221243032421012 is a wasteful number, since it uses less digits than its factorization.

221243032421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951641415 (or 2951641413 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 221243032421012 its reverse (210124230342122), we get a palindrome (431367262763134).

The spelling of 221243032421012 in words is "two hundred twenty-one trillion, two hundred forty-three billion, thirty-two million, four hundred twenty-one thousand, twelve".