221421251731043 has 8 divisors (see below), whose sum is σ = 272518463669088. Its totient is φ = 175190440929984.

The previous prime is 221421251731007. The next prime is 221421251731091. The reversal of 221421251731043 is 340137152124122.

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

It is a cyclic number.

It is not a de Polignac number, because 221421251731043 - 2²⁸ = 221420983295587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221421251730988 and 221421251731006.

It is not an unprimeable number, because it can be changed into a prime (221421251731003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216600284146 + ... + 1216600284327.

It is an arithmetic number, because the mean of its divisors is an integer number (34064807958636).

Almost surely, 2^{221421251731043} is an apocalyptic number.

221421251731043 is a deficient number, since it is larger than the sum of its proper divisors (51097211938045).

221421251731043 is a wasteful number, since it uses less digits than its factorization.

221421251731043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433200568493.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 221421251731043 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, seven hundred thirty-one thousand, forty-three".