138212211842 has 16 divisors (see below), whose sum is σ = 208650758112. Its totient is φ = 68663367840.

The previous prime is 138212211833. The next prime is 138212211859. The reversal of 138212211842 is 248112212831.

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, 155459 + ... + 548262.

It is an arithmetic number, because the mean of its divisors is an integer number (13040672382).

Almost surely, 2^138212211842 is an apocalyptic number.

138212211842 is a deficient number, since it is larger than the sum of its proper divisors (70438546270).

138212211842 is a wasteful number, since it uses less digits than its factorization.

138212211842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704353.

The product of its digits is 12288, while the sum is 35.

The spelling of 138212211842 in words is "one hundred thirty-eight billion, two hundred twelve million, two hundred eleven thousand, eight hundred forty-two".