221221402040430 has 48 divisors (see below), whose sum is σ = 627464340335664. Its totient is φ = 53629430797440.

The previous prime is 221221402040423. The next prime is 221221402040453. The reversal of 221221402040430 is 34040204122122.

It is a happy number.

221221402040430 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 21 + 4 + 0 + 204 + 0 + 430 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 221221402040394 and 221221402040403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111727979839 + ... + 111727981818.

It is an arithmetic number, because the mean of its divisors is an integer number (13072173756993).

Almost surely, 2^{221221402040430} is an apocalyptic number.

221221402040430 is an abundant number, since it is smaller than the sum of its proper divisors (406242938295234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221221402040430 is a wasteful number, since it uses less digits than its factorization.

221221402040430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223455961681 (or 223455961678 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221221402040430 its reverse (34040204122122), we get a palindrome (255261606162552).

The spelling of 221221402040430 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred two million, forty thousand, four hundred thirty".