1172939047721 has 8 divisors (see below), whose sum is σ = 1340880576960. Its totient is φ = 1005092220528.

The previous prime is 1172939047699. The next prime is 1172939047727. The reversal of 1172939047721 is 1277409392711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1172939047721 - 2³⁸ = 898061140777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172939047727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23648966 + ... + 23698511.

It is an arithmetic number, because the mean of its divisors is an integer number (167610072120).

Almost surely, 2^{1172939047721} is an apocalyptic number.

It is an amenable number.

1172939047721 is a deficient number, since it is larger than the sum of its proper divisors (167941529239).

1172939047721 is an equidigital number, since it uses as much as digits as its factorization.

1172939047721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47351023.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 1172939047721 in words is "one trillion, one hundred seventy-two billion, nine hundred thirty-nine million, forty-seven thousand, seven hundred twenty-one".