2021118823 has 2 divisors, whose sum is σ = 2021118824. Its totient is φ = 2021118822.

The previous prime is 2021118817. The next prime is 2021118833. The reversal of 2021118823 is 3288111202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021118823 is a prime.

It is a super-3 number, since 3×2021118823³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021118791 and 2021118800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021118833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010559411 + 1010559412.

It is an arithmetic number, because the mean of its divisors is an integer number (1010559412).

Almost surely, 2^2021118823 is an apocalyptic number.

2021118823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021118823 is an equidigital number, since it uses as much as digits as its factorization.

2021118823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 2021118823 is about 44956.8551280002. The cubic root of 2021118823 is about 1264.3402065793.

The spelling of 2021118823 in words is "two billion, twenty-one million, one hundred eighteen thousand, eight hundred twenty-three".