139333772721 has 32 divisors (see below), whose sum is σ = 229744327680. Its totient is φ = 73846382400.

The previous prime is 139333772707. The next prime is 139333772723. The reversal of 139333772721 is 127277333931.

It is not a de Polignac number, because 139333772721 - 2⁶ = 139333772657 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (139333772723) 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, 8538885 + ... + 8555186.

It is an arithmetic number, because the mean of its divisors is an integer number (7179510240).

Almost surely, 2^139333772721 is an apocalyptic number.

139333772721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139333772721 is a deficient number, since it is larger than the sum of its proper divisors (90410554959).

139333772721 is a wasteful number, since it uses less digits than its factorization.

139333772721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094117.

The product of its digits is 1000188, while the sum is 48.

The spelling of 139333772721 in words is "one hundred thirty-nine billion, three hundred thirty-three million, seven hundred seventy-two thousand, seven hundred twenty-one".