221142142444 has 12 divisors (see below), whose sum is σ = 387380788704. Its totient is φ = 110461917104.

The previous prime is 221142142439. The next prime is 221142142471. The reversal of 221142142444 is 444241241122.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27283972 + ... + 27292075.

It is an arithmetic number, because the mean of its divisors is an integer number (32281732392).

Almost surely, 2^221142142444 is an apocalyptic number.

It is an amenable number.

221142142444 is a deficient number, since it is larger than the sum of its proper divisors (166238646260).

221142142444 is a wasteful number, since it uses less digits than its factorization.

221142142444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54577064 (or 54577062 counting only the distinct ones).

The product of its digits is 16384, while the sum is 31.

Adding to 221142142444 its reverse (444241241122), we get a palindrome (665383383566).

The spelling of 221142142444 in words is "two hundred twenty-one billion, one hundred forty-two million, one hundred forty-two thousand, four hundred forty-four".