20213032123221 has 16 divisors (see below), whose sum is σ = 32421906163200. Its totient is φ = 10942393329648.

The previous prime is 20213032123189. The next prime is 20213032123261. The reversal of 20213032123221 is 12232123031202.

It is not a de Polignac number, because 20213032123221 - 2⁵ = 20213032123189 is a prime.

It is a super-2 number, since 2×20213032123221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20213032123191 and 20213032123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213032123261) 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 15 ways as a sum of consecutive naturals, for example, 25329613791 + ... + 25329614588.

It is an arithmetic number, because the mean of its divisors is an integer number (2026369135200).

Almost surely, 2^{20213032123221} is an apocalyptic number.

20213032123221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20213032123221 is a deficient number, since it is larger than the sum of its proper divisors (12208874039979).

20213032123221 is a wasteful number, since it uses less digits than its factorization.

20213032123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50659228408.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20213032123221 its reverse (12232123031202), we get a palindrome (32445155154423).

It can be divided in two parts, 20213032 and 123221, that added together give a triangular number (20336253 = T₆₃₇₇).

The spelling of 20213032123221 in words is "twenty trillion, two hundred thirteen billion, thirty-two million, one hundred twenty-three thousand, two hundred twenty-one".