221020002255 has 32 divisors (see below), whose sum is σ = 383260215744. Its totient is φ = 108116775936.

The previous prime is 221020002253. The next prime is 221020002271. The reversal of 221020002255 is 552200020122.

It is not a de Polignac number, because 221020002255 - 2¹ = 221020002253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020002253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3579054 + ... + 3640283.

It is an arithmetic number, because the mean of its divisors is an integer number (11976881742).

Almost surely, 2^221020002255 is an apocalyptic number.

221020002255 is a deficient number, since it is larger than the sum of its proper divisors (162240213489).

221020002255 is a wasteful number, since it uses less digits than its factorization.

221020002255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219515.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 221020002255 its reverse (552200020122), we get a palindrome (773220022377).

The spelling of 221020002255 in words is "two hundred twenty-one billion, twenty million, two thousand, two hundred fifty-five".