221401412430 has 32 divisors (see below), whose sum is σ = 579669153408. Its totient is φ = 53673069600.

The previous prime is 221401412429. The next prime is 221401412501. The reversal of 221401412430 is 34214104122.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221401412430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335456356 + ... + 335457015.

It is an arithmetic number, because the mean of its divisors is an integer number (18114661044).

Almost surely, 2^221401412430 is an apocalyptic number.

221401412430 is an abundant number, since it is smaller than the sum of its proper divisors (358267740978).

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

221401412430 is a wasteful number, since it uses less digits than its factorization.

221401412430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670913392.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221401412430 its reverse (34214104122), we get a palindrome (255615516552).

The spelling of 221401412430 in words is "two hundred twenty-one billion, four hundred one million, four hundred twelve thousand, four hundred thirty".