1023233554021 has 12 divisors (see below), whose sum is σ = 1191405617580. Its totient is φ = 876236840640.

The previous prime is 1023233553959. The next prime is 1023233554081. The reversal of 1023233554021 is 1204553323201.

It can be written as a sum of positive squares in 2 ways, for example, as 659969388225 + 363264165796 = 812385^2 + 602714^2 .

It is not a de Polignac number, because 1023233554021 - 2¹⁵ = 1023233521253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023233554081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9714840 + ... + 9819601.

It is an arithmetic number, because the mean of its divisors is an integer number (99283801465).

Almost surely, 2^{1023233554021} is an apocalyptic number.

It is an amenable number.

1023233554021 is a deficient number, since it is larger than the sum of its proper divisors (168172063559).

1023233554021 is a wasteful number, since it uses less digits than its factorization.

1023233554021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19535524 (or 19535517 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1023233554021 its reverse (1204553323201), we get a palindrome (2227786877222).

The spelling of 1023233554021 in words is "one trillion, twenty-three billion, two hundred thirty-three million, five hundred fifty-four thousand, twenty-one".