221266465201055 has 4 divisors (see below), whose sum is σ = 265519758241272. Its totient is φ = 177013172160840.

The previous prime is 221266465201043. The next prime is 221266465201091. The reversal of 221266465201055 is 550102564662122.

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

It is not a de Polignac number, because 221266465201055 - 2¹⁰ = 221266465200031 is a prime.

It is a super-2 number, since 2×221266465201055² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22126646520101 + ... + 22126646520110.

It is an arithmetic number, because the mean of its divisors is an integer number (66379939560318).

Almost surely, 2^{221266465201055} is an apocalyptic number.

221266465201055 is a deficient number, since it is larger than the sum of its proper divisors (44253293040217).

221266465201055 is an equidigital number, since it uses as much as digits as its factorization.

221266465201055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44253293040216.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 221266465201055 in words is "two hundred twenty-one trillion, two hundred sixty-six billion, four hundred sixty-five million, two hundred one thousand, fifty-five".