1339737399221 has 4 divisors (see below), whose sum is σ = 1442794122252. Its totient is φ = 1236680676192.

The previous prime is 1339737399149. The next prime is 1339737399257. The reversal of 1339737399221 is 1229937379331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 907018140625 + 432719258596 = 952375^2 + 657814^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1339737399221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339737399271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51528361496 + ... + 51528361521.

It is an arithmetic number, because the mean of its divisors is an integer number (360698530563).

Almost surely, 2^{1339737399221} is an apocalyptic number.

It is an amenable number.

1339737399221 is a deficient number, since it is larger than the sum of its proper divisors (103056723031).

1339737399221 is a wasteful number, since it uses less digits than its factorization.

1339737399221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103056723030.

The product of its digits is 11573604, while the sum is 59.

The spelling of 1339737399221 in words is "one trillion, three hundred thirty-nine billion, seven hundred thirty-seven million, three hundred ninety-nine thousand, two hundred twenty-one".