221400141221 has 12 divisors (see below), whose sum is σ = 257606870688. Its totient is φ = 189727510392.

The previous prime is 221400141217. The next prime is 221400141227. The reversal of 221400141221 is 122141004122.

221400141221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221400141221 - 2² = 221400141217 is a prime.

It is a super-3 number, since 3×221400141221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221400141193 and 221400141202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400141227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310091 + ... + 734136.

It is an arithmetic number, because the mean of its divisors is an integer number (21467239224).

Almost surely, 2^221400141221 is an apocalyptic number.

It is an amenable number.

221400141221 is a deficient number, since it is larger than the sum of its proper divisors (36206729467).

221400141221 is a wasteful number, since it uses less digits than its factorization.

221400141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048568 (or 1048561 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221400141221 its reverse (122141004122), we get a palindrome (343541145343).

The spelling of 221400141221 in words is "two hundred twenty-one billion, four hundred million, one hundred forty-one thousand, two hundred twenty-one".