221421203572355 has 8 divisors (see below), whose sum is σ = 265746786389232. Its totient is φ = 177109401456288.

The previous prime is 221421203572343. The next prime is 221421203572421. The reversal of 221421203572355 is 553275302124122.

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 221421203572355 - 2²⁴ = 221421186795139 is a prime.

It is a super-2 number, since 2×221421203572355² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3445139852 + ... + 3445204121.

It is an arithmetic number, because the mean of its divisors is an integer number (33218348298654).

Almost surely, 2^{221421203572355} is an apocalyptic number.

221421203572355 is a deficient number, since it is larger than the sum of its proper divisors (44325582816877).

221421203572355 is an equidigital number, since it uses as much as digits as its factorization.

221421203572355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890350405.

The product of its (nonzero) digits is 1008000, while the sum is 44.

Adding to 221421203572355 its reverse (553275302124122), we get a palindrome (774696505696477).

The spelling of 221421203572355 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy-two thousand, three hundred fifty-five".