2021043911137 has 2 divisors, whose sum is σ = 2021043911138. Its totient is φ = 2021043911136.

The previous prime is 2021043911123. The next prime is 2021043911143. The reversal of 2021043911137 is 7311193401202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1579455751696 + 441588159441 = 1256764^2 + 664521^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021043911137 - 2⁷ = 2021043911009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021043911147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010521955568 + 1010521955569.

It is an arithmetic number, because the mean of its divisors is an integer number (1010521955569).

Almost surely, 2^{2021043911137} is an apocalyptic number.

It is an amenable number.

2021043911137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021043911137 is an equidigital number, since it uses as much as digits as its factorization.

2021043911137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 2021043911137 in words is "two trillion, twenty-one billion, forty-three million, nine hundred eleven thousand, one hundred thirty-seven".