138821102 has 16 divisors (see below), whose sum is σ = 238761600. Its totient is φ = 59299128.

The previous prime is 138821083. The next prime is 138821129. The reversal of 138821102 is 201128831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11852 + ... + 20447.

It is an arithmetic number, because the mean of its divisors is an integer number (14922600).

Almost surely, 2^138821102 is an apocalyptic number.

138821102 is a deficient number, since it is larger than the sum of its proper divisors (99940498).

138821102 is a wasteful number, since it uses less digits than its factorization.

138821102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32615.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 138821102 is about 11782.2367146480. The cubic root of 138821102 is about 517.7878187653.

Adding to 138821102 its reverse (201128831), we get a palindrome (339949933).

The spelling of 138821102 in words is "one hundred thirty-eight million, eight hundred twenty-one thousand, one hundred two".