221221110021303 has 48 divisors (see below), whose sum is σ = 358094441203200. Its totient is φ = 120896369060544.

The previous prime is 221221110021281. The next prime is 221221110021337. The reversal of 221221110021303 is 303120011122122.

It is not a de Polignac number, because 221221110021303 - 2²⁸ = 221220841585847 is a prime.

It is a super-2 number, since 2×221221110021303² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 221221110021303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221110421303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15681301 + ... + 26236337.

It is an arithmetic number, because the mean of its divisors is an integer number (7460300858400).

Almost surely, 2^{221221110021303} is an apocalyptic number.

221221110021303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221221110021303 is a deficient number, since it is larger than the sum of its proper divisors (136873331181897).

221221110021303 is a wasteful number, since it uses less digits than its factorization.

221221110021303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561276 (or 10561269 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221221110021303 its reverse (303120011122122), we get a palindrome (524341121143425).

The spelling of 221221110021303 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, twenty-one thousand, three hundred three".