221199999939 has 36 divisors (see below), whose sum is σ = 330489402048. Its totient is φ = 142563152160.

The previous prime is 221199999893. The next prime is 221199999971. The reversal of 221199999939 is 939999991122.

It is not a de Polignac number, because 221199999939 - 2²³ = 221191611331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221199999989) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8748814 + ... + 8774060.

It is an arithmetic number, because the mean of its divisors is an integer number (9180261168).

Almost surely, 2^221199999939 is an apocalyptic number.

221199999939 is a deficient number, since it is larger than the sum of its proper divisors (109289402109).

221199999939 is a wasteful number, since it uses less digits than its factorization.

221199999939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328 (or 26294 counting only the distinct ones).

The product of its digits is 57395628, while the sum is 72.

The spelling of 221199999939 in words is "two hundred twenty-one billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-nine".