107206747721 has 4 divisors (see below), whose sum is σ = 107338939344. Its totient is φ = 107074556100.

The previous prime is 107206747717. The next prime is 107206747799. The reversal of 107206747721 is 127747602701.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127747602701 = 1021 ⋅125120081.

It is a cyclic number.

It is not a de Polignac number, because 107206747721 - 2² = 107206747717 is a prime.

It is a super-2 number, since 2×107206747721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107206740721) 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, 66094595 + ... + 66096216.

It is an arithmetic number, because the mean of its divisors is an integer number (26834734836).

Almost surely, 2^107206747721 is an apocalyptic number.

It is an amenable number.

107206747721 is a deficient number, since it is larger than the sum of its proper divisors (132191623).

107206747721 is an equidigital number, since it uses as much as digits as its factorization.

107206747721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132191622.

The product of its (nonzero) digits is 230496, while the sum is 44.

The spelling of 107206747721 in words is "one hundred seven billion, two hundred six million, seven hundred forty-seven thousand, seven hundred twenty-one".