20212323331 has 4 divisors (see below), whose sum is σ = 20397757600. Its totient is φ = 20026889064.

The previous prime is 20212323319. The next prime is 20212323353. The reversal of 20212323331 is 13332321202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13332321202 = 2 ⋅6666160601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212323331 is a prime.

It is a super-2 number, since 2×20212323331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212323301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92716971 + ... + 92717188.

It is an arithmetic number, because the mean of its divisors is an integer number (5099439400).

Almost surely, 2^20212323331 is an apocalyptic number.

20212323331 is a deficient number, since it is larger than the sum of its proper divisors (185434269).

20212323331 is a wasteful number, since it uses less digits than its factorization.

20212323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185434268.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20212323331 its reverse (13332321202), we get a palindrome (33544644533).

The spelling of 20212323331 in words is "twenty billion, two hundred twelve million, three hundred twenty-three thousand, three hundred thirty-one".