1123201289665 has 16 divisors (see below), whose sum is σ = 1658881905408. Its totient is φ = 710949387456.

The previous prime is 1123201289659. The next prime is 1123201289711. The reversal of 1123201289665 is 5669821023211.

It is not a de Polignac number, because 1123201289665 - 2²¹ = 1123199192513 is a prime.

It is a super-2 number, since 2×1123201289665² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1234286677 + ... + 1234287586.

It is an arithmetic number, because the mean of its divisors is an integer number (103680119088).

Almost surely, 2^{1123201289665} is an apocalyptic number.

It is an amenable number.

1123201289665 is a deficient number, since it is larger than the sum of its proper divisors (535680615743).

1123201289665 is a wasteful number, since it uses less digits than its factorization.

1123201289665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468574288.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 1123201289665 in words is "one trillion, one hundred twenty-three billion, two hundred one million, two hundred eighty-nine thousand, six hundred sixty-five".