1123357064721 has 16 divisors (see below), whose sum is σ = 1531158714624. Its totient is φ = 732260916864.

The previous prime is 1123357064717. The next prime is 1123357064737. The reversal of 1123357064721 is 1274607533211.

It is not a de Polignac number, because 1123357064721 - 2² = 1123357064717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123357064771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3710626 + ... + 4001931.

It is an arithmetic number, because the mean of its divisors is an integer number (95697419664).

Almost surely, 2^{1123357064721} is an apocalyptic number.

It is an amenable number.

1123357064721 is a deficient number, since it is larger than the sum of its proper divisors (407801649903).

1123357064721 is a wasteful number, since it uses less digits than its factorization.

1123357064721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713640.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 1123357064721 in words is "one trillion, one hundred twenty-three billion, three hundred fifty-seven million, sixty-four thousand, seven hundred twenty-one".