21213020121033 has 64 divisors (see below), whose sum is σ = 31922780037120. Its totient is φ = 12445163198208.

The previous prime is 21213020121023. The next prime is 21213020121049. The reversal of 21213020121033 is 33012102031212.

It is not a de Polignac number, because 21213020121033 - 2⁸ = 21213020120777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213020121023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12718260 + ... + 14289162.

It is an arithmetic number, because the mean of its divisors is an integer number (498793438080).

Almost surely, 2^{21213020121033} is an apocalyptic number.

It is an amenable number.

21213020121033 is a deficient number, since it is larger than the sum of its proper divisors (10709759916087).

21213020121033 is a wasteful number, since it uses less digits than its factorization.

21213020121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571158.

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

Adding to 21213020121033 its reverse (33012102031212), we get a palindrome (54225122152245).

The spelling of 21213020121033 in words is "twenty-one trillion, two hundred thirteen billion, twenty million, one hundred twenty-one thousand, thirty-three".