1223331105645 has 24 divisors (see below), whose sum is σ = 2313207909792. Its totient is φ = 593130232800.

The previous prime is 1223331105637. The next prime is 1223331105713. The reversal of 1223331105645 is 5465011333221.

1223331105645 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 3 + 3 + 1 + 1 + 0 + 5 + 645 = 666.

It is not a de Polignac number, because 1223331105645 - 2³ = 1223331105637 is a prime.

It is a super-3 number, since 3×1223331105645³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1235687491 + ... + 1235688480.

It is an arithmetic number, because the mean of its divisors is an integer number (96383662908).

Almost surely, 2^{1223331105645} is an apocalyptic number.

1223331105645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223331105645 is a deficient number, since it is larger than the sum of its proper divisors (1089876804147).

1223331105645 is a wasteful number, since it uses less digits than its factorization.

1223331105645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471375993 (or 2471375990 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 1223331105645 its reverse (5465011333221), we get a palindrome (6688342438866).

The spelling of 1223331105645 in words is "one trillion, two hundred twenty-three billion, three hundred thirty-one million, one hundred five thousand, six hundred forty-five".