1223020534545 has 96 divisors (see below), whose sum is σ = 2332420272000. Its totient is φ = 612672906240.

The previous prime is 1223020534513. The next prime is 1223020534553. The reversal of 1223020534545 is 5454350203221.

1223020534545 is a `hidden beast` number, since 1 + 2 + 2 + 302 + 0 + 5 + 345 + 4 + 5 = 666.

It is not a de Polignac number, because 1223020534545 - 2⁵ = 1223020534513 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10247515 + ... + 10366175.

It is an arithmetic number, because the mean of its divisors is an integer number (24296044500).

Almost surely, 2^{1223020534545} is an apocalyptic number.

1223020534545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223020534545 is a deficient number, since it is larger than the sum of its proper divisors (1109399737455).

1223020534545 is a wasteful number, since it uses less digits than its factorization.

1223020534545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119197 (or 119185 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 1223020534545 its reverse (5454350203221), we get a palindrome (6677370737766).

The spelling of 1223020534545 in words is "one trillion, two hundred twenty-three billion, twenty million, five hundred thirty-four thousand, five hundred forty-five".