20213033121 has 24 divisors (see below), whose sum is σ = 30529774080. Its totient is φ = 12862498176.

The previous prime is 20213033119. The next prime is 20213033129. The reversal of 20213033121 is 12133031202.

20213033121 is a `hidden beast` number, since 202 + 130 + 331 + 2 + 1 = 666.

It is not a de Polignac number, because 20213033121 - 2¹ = 20213033119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213033094 and 20213033103.

It is not an unprimeable number, because it can be changed into a prime (20213033129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2776 + ... + 201081.

It is an arithmetic number, because the mean of its divisors is an integer number (1272073920).

Almost surely, 2^20213033121 is an apocalyptic number.

It is an amenable number.

20213033121 is a deficient number, since it is larger than the sum of its proper divisors (10316740959).

20213033121 is a wasteful number, since it uses less digits than its factorization.

20213033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204365 (or 204362 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20213033121 its reverse (12133031202), we get a palindrome (32346064323).

The spelling of 20213033121 in words is "twenty billion, two hundred thirteen million, thirty-three thousand, one hundred twenty-one".