221434031142 has 24 divisors (see below), whose sum is σ = 479783609760. Its totient is φ = 73809824400.

The previous prime is 221434031083. The next prime is 221434031213. The reversal of 221434031142 is 241130434122.

221434031142 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 340 + 311 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1086084 + ... + 1273752.

It is an arithmetic number, because the mean of its divisors is an integer number (19990983740).

Almost surely, 2^221434031142 is an apocalyptic number.

221434031142 is an abundant number, since it is smaller than the sum of its proper divisors (258349578618).

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

221434031142 is a wasteful number, since it uses less digits than its factorization.

221434031142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253228 (or 253225 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221434031142 its reverse (241130434122), we get a palindrome (462564465264).

The spelling of 221434031142 in words is "two hundred twenty-one billion, four hundred thirty-four million, thirty-one thousand, one hundred forty-two".