221421255572143 has 4 divisors (see below), whose sum is σ = 241550460624168. Its totient is φ = 201292050520120.

The previous prime is 221421255572093. The next prime is 221421255572269. The reversal of 221421255572143 is 341275552124122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221421255572143 - 2²¹ = 221421253474991 is a prime.

It is a super-2 number, since 2×221421255572143² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221421255572093 and 221421255572102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421255570143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10064602525996 + ... + 10064602526017.

It is an arithmetic number, because the mean of its divisors is an integer number (60387615156042).

Almost surely, 2^{221421255572143} is an apocalyptic number.

221421255572143 is a deficient number, since it is larger than the sum of its proper divisors (20129205052025).

221421255572143 is a wasteful number, since it uses less digits than its factorization.

221421255572143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129205052024.

The product of its digits is 1344000, while the sum is 46.

The spelling of 221421255572143 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, one hundred forty-three".