21033121120023 has 16 divisors (see below), whose sum is σ = 28061705961216. Its totient is φ = 14013309736320.

The previous prime is 21033121120019. The next prime is 21033121120031. The reversal of 21033121120023 is 32002112133012.

It is not a de Polignac number, because 21033121120023 - 2² = 21033121120019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033121120013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72158911 + ... + 72449807.

It is an arithmetic number, because the mean of its divisors is an integer number (1753856622576).

Almost surely, 2^{21033121120023} is an apocalyptic number.

21033121120023 is a deficient number, since it is larger than the sum of its proper divisors (7028584841193).

21033121120023 is a wasteful number, since it uses less digits than its factorization.

21033121120023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305894.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21033121120023 its reverse (32002112133012), we get a palindrome (53035233253035).

The spelling of 21033121120023 in words is "twenty-one trillion, thirty-three billion, one hundred twenty-one million, one hundred twenty thousand, twenty-three".