1123021166531 has 8 divisors (see below), whose sum is σ = 1251180255744. Its totient is φ = 999206453320.

The previous prime is 1123021166513. The next prime is 1123021166563. The reversal of 1123021166531 is 1356611203211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123021166531 is a prime.

It is a super-2 number, since 2×1123021166531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123021166431) 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, 1086093455 + ... + 1086094488.

It is an arithmetic number, because the mean of its divisors is an integer number (156397531968).

Almost surely, 2^{1123021166531} is an apocalyptic number.

1123021166531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123021166531 is a deficient number, since it is larger than the sum of its proper divisors (128159089213).

1123021166531 is a wasteful number, since it uses less digits than its factorization.

1123021166531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172188001.

The product of its (nonzero) digits is 6480, while the sum is 32.

Adding to 1123021166531 its reverse (1356611203211), we get a palindrome (2479632369742).

The spelling of 1123021166531 in words is "one trillion, one hundred twenty-three billion, twenty-one million, one hundred sixty-six thousand, five hundred thirty-one".