139834815122 has 18 divisors (see below), whose sum is σ = 212206895829. Its totient is φ = 69108549840.

The previous prime is 139834815119. The next prime is 139834815143. The reversal of 139834815122 is 221518438931.

It can be written as a sum of positive squares in 2 ways, for example, as 124996895401 + 14837919721 = 353549^2 + 121811^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=264419.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47065097 + ... + 47068067.

Almost surely, 2^139834815122 is an apocalyptic number.

139834815122 is a deficient number, since it is larger than the sum of its proper divisors (72372080707).

139834815122 is an frugal number, since it uses more digits than its factorization.

139834815122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122 (or 3062 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The spelling of 139834815122 in words is "one hundred thirty-nine billion, eight hundred thirty-four million, eight hundred fifteen thousand, one hundred twenty-two".