221042514431420 has 96 divisors (see below), whose sum is σ = 522051950762496. Its totient is φ = 77909323564800.

The previous prime is 221042514431381. The next prime is 221042514431461. The reversal of 221042514431420 is 24134415240122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49484846 + ... + 53766485.

It is an arithmetic number, because the mean of its divisors is an integer number (5438041153776).

Almost surely, 2^{221042514431420} is an apocalyptic number.

221042514431420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221042514431420 is an abundant number, since it is smaller than the sum of its proper divisors (301009436331076).

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

221042514431420 is a wasteful number, since it uses less digits than its factorization.

221042514431420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103251651 (or 103251649 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 221042514431420 its reverse (24134415240122), we get a palindrome (245176929671542).

The spelling of 221042514431420 in words is "two hundred twenty-one trillion, forty-two billion, five hundred fourteen million, four hundred thirty-one thousand, four hundred twenty".