20212331203111 has 4 divisors (see below), whose sum is σ = 20255612426712. Its totient is φ = 20169049979512.

The previous prime is 20212331203091. The next prime is 20212331203117. The reversal of 20212331203111 is 11130213321202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20212331203111 - 2⁹ = 20212331202599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212331203117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21640611100 + ... + 21640612033.

It is an arithmetic number, because the mean of its divisors is an integer number (5063903106678).

Almost surely, 2^{20212331203111} is an apocalyptic number.

20212331203111 is a deficient number, since it is larger than the sum of its proper divisors (43281223601).

20212331203111 is an equidigital number, since it uses as much as digits as its factorization.

20212331203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43281223600.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20212331203111 its reverse (11130213321202), we get a palindrome (31342544524313).

The spelling of 20212331203111 in words is "twenty trillion, two hundred twelve billion, three hundred thirty-one million, two hundred three thousand, one hundred eleven".