2021111020231 has 4 divisors (see below), whose sum is σ = 2139999903792. Its totient is φ = 1902222136672.

The previous prime is 2021111020211. The next prime is 2021111020261. The reversal of 2021111020231 is 1320201111202.

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 2021111020231 - 2¹⁷ = 2021110889159 is a prime.

It is a super-2 number, since 2×2021111020231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111020211) 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, 59444441755 + ... + 59444441788.

It is an arithmetic number, because the mean of its divisors is an integer number (534999975948).

Almost surely, 2^{2021111020231} is an apocalyptic number.

2021111020231 is a deficient number, since it is larger than the sum of its proper divisors (118888883561).

2021111020231 is a wasteful number, since it uses less digits than its factorization.

2021111020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118888883560.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2021111020231 its reverse (1320201111202), we get a palindrome (3341312131433).

The spelling of 2021111020231 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty thousand, two hundred thirty-one".