139744051221 has 4 divisors (see below), whose sum is σ = 186325401632. Its totient is φ = 93162700812.

The previous prime is 139744051217. The next prime is 139744051241. The reversal of 139744051221 is 122150447931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 139744051221 - 2² = 139744051217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139744051221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139744051211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23290675201 + ... + 23290675206.

It is an arithmetic number, because the mean of its divisors is an integer number (46581350408).

Almost surely, 2^139744051221 is an apocalyptic number.

It is an amenable number.

139744051221 is a deficient number, since it is larger than the sum of its proper divisors (46581350411).

139744051221 is an equidigital number, since it uses as much as digits as its factorization.

139744051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46581350410.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 139744051221 in words is "one hundred thirty-nine billion, seven hundred forty-four million, fifty-one thousand, two hundred twenty-one".