221054554455311 has 4 divisors (see below), whose sum is σ = 221054590957152. Its totient is φ = 221054517953472.

The previous prime is 221054554455289. The next prime is 221054554455407. The reversal of 221054554455311 is 113554455450122.

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 221054554455311 - 2²² = 221054550261007 is a prime.

It is a super-2 number, since 2×221054554455311² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221054556455311) 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, 6751991 + ... + 22083896.

It is an arithmetic number, because the mean of its divisors is an integer number (55263647739288).

Almost surely, 2^{221054554455311} is an apocalyptic number.

221054554455311 is a deficient number, since it is larger than the sum of its proper divisors (36501841).

221054554455311 is an equidigital number, since it uses as much as digits as its factorization.

221054554455311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36501840.

The product of its (nonzero) digits is 2400000, while the sum is 47.

The spelling of 221054554455311 in words is "two hundred twenty-one trillion, fifty-four billion, five hundred fifty-four million, four hundred fifty-five thousand, three hundred eleven".