2021230131111 has 24 divisors (see below), whose sum is σ = 2922909176720. Its totient is φ = 1345939410816.

The previous prime is 2021230131061. The next prime is 2021230131149. The reversal of 2021230131111 is 1111310321202.

2021230131111 is a `hidden beast` number, since 20 + 21 + 2 + 301 + 311 + 11 = 666.

It is not a de Polignac number, because 2021230131111 - 2¹⁵ = 2021230098343 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 (2021230131181) 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, 28008171 + ... + 28080243.

Almost surely, 2^{2021230131111} is an apocalyptic number.

2021230131111 is a deficient number, since it is larger than the sum of its proper divisors (901679045609).

2021230131111 is a wasteful number, since it uses less digits than its factorization.

2021230131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75615 (or 75612 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2021230131111 its reverse (1111310321202), we get a palindrome (3132540452313).

The spelling of 2021230131111 in words is "two trillion, twenty-one billion, two hundred thirty million, one hundred thirty-one thousand, one hundred eleven".