138212211841 has 32 divisors (see below), whose sum is σ = 162543283200. Its totient is φ = 116194680000.

The previous prime is 138212211833. The next prime is 138212211859. The reversal of 138212211841 is 148112212831.

It is a cyclic number.

It is not a de Polignac number, because 138212211841 - 2³ = 138212211833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138212211797 and 138212211806.

It is not an unprimeable number, because it can be changed into a prime (138212211871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1452630 + ... + 1544848.

It is an arithmetic number, because the mean of its divisors is an integer number (5079477600).

Almost surely, 2^138212211841 is an apocalyptic number.

138212211841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138212211841 is a deficient number, since it is larger than the sum of its proper divisors (24331071359).

138212211841 is a wasteful number, since it uses less digits than its factorization.

138212211841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92421.

The product of its digits is 6144, while the sum is 34.

It can be divided in two parts, 138212 and 211841, that added together give a palindrome (350053).

The spelling of 138212211841 in words is "one hundred thirty-eight billion, two hundred twelve million, two hundred eleven thousand, eight hundred forty-one".