1023233545521 has 32 divisors (see below), whose sum is σ = 1658476684800. Its totient is φ = 618354329040.

The previous prime is 1023233545511. The next prime is 1023233545573. The reversal of 1023233545521 is 1255453323201.

1023233545521 is a `hidden beast` number, since 1 + 0 + 2 + 32 + 33 + 545 + 52 + 1 = 666.

It is not a de Polignac number, because 1023233545521 - 2⁶ = 1023233545457 is a prime.

It is a super-2 number, since 2×1023233545521² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1023233545511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4861251 + ... + 5067368.

It is an arithmetic number, because the mean of its divisors is an integer number (51827396400).

Almost surely, 2^{1023233545521} is an apocalyptic number.

1023233545521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1023233545521 is a deficient number, since it is larger than the sum of its proper divisors (635243139279).

1023233545521 is a wasteful number, since it uses less digits than its factorization.

1023233545521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9928986 (or 9928980 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 1023233545521 its reverse (1255453323201), we get a palindrome (2278686868722).

The spelling of 1023233545521 in words is "one trillion, twenty-three billion, two hundred thirty-three million, five hundred forty-five thousand, five hundred twenty-one".