221421255445067 has 8 divisors (see below), whose sum is σ = 221724235498080. Its totient is φ = 221118277858560.

The previous prime is 221421255445031. The next prime is 221421255445081. The reversal of 221421255445067 is 760544552124122.

It is a happy number.

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 221421255445067 - 2¹² = 221421255440971 is a prime.

It is a super-2 number, since 2×221421255445067² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221421255445967) 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, 246948059 + ... + 247843067.

It is an arithmetic number, because the mean of its divisors is an integer number (27715529437260).

Almost surely, 2^{221421255445067} is an apocalyptic number.

221421255445067 is a deficient number, since it is larger than the sum of its proper divisors (302980053013).

221421255445067 is an equidigital number, since it uses as much as digits as its factorization.

221421255445067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233253.

The product of its (nonzero) digits is 5376000, while the sum is 50.

The spelling of 221421255445067 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, four hundred forty-five thousand, sixty-seven".