2021654123 has 2 divisors, whose sum is σ = 2021654124. Its totient is φ = 2021654122.

The previous prime is 2021654113. The next prime is 2021654143. The reversal of 2021654123 is 3214561202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021654123 - 2⁸ = 2021653867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021654092 and 2021654101.

It is not a weakly prime, because it can be changed into another prime (2021654113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010827061 + 1010827062.

It is an arithmetic number, because the mean of its divisors is an integer number (1010827062).

Almost surely, 2^2021654123 is an apocalyptic number.

2021654123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021654123 is an equidigital number, since it uses as much as digits as its factorization.

2021654123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2021654123 is about 44962.8082196831. The cubic root of 2021654123 is about 1264.4518182870.

The spelling of 2021654123 in words is "two billion, twenty-one million, six hundred fifty-four thousand, one hundred twenty-three".