2021357838187 has 2 divisors, whose sum is σ = 2021357838188. Its totient is φ = 2021357838186.

The previous prime is 2021357838163. The next prime is 2021357838239. The reversal of 2021357838187 is 7818387531202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021357838187 - 2¹¹ = 2021357836139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021357838287) 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, 1010678919093 + 1010678919094.

It is an arithmetic number, because the mean of its divisors is an integer number (1010678919094).

Almost surely, 2^{2021357838187} is an apocalyptic number.

2021357838187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021357838187 is an equidigital number, since it uses as much as digits as its factorization.

2021357838187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 2021357838187 in words is "two trillion, twenty-one billion, three hundred fifty-seven million, eight hundred thirty-eight thousand, one hundred eighty-seven".