2021021021137 has 2 divisors, whose sum is σ = 2021021021138. Its totient is φ = 2021021021136.

The previous prime is 2021021021099. The next prime is 2021021021147. The reversal of 2021021021137 is 7311201201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1981115365441 + 39905655696 = 1407521^2 + 199764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021021021137 - 2²⁷ = 2020886803409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021021021147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510510568 + 1010510510569.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510510569).

Almost surely, 2^{2021021021137} is an apocalyptic number.

It is an amenable number.

2021021021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021021021137 is an equidigital number, since it uses as much as digits as its factorization.

2021021021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 2021021021137 its reverse (7311201201202), we get a palindrome (9332222222339).

The spelling of 2021021021137 in words is "two trillion, twenty-one billion, twenty-one million, twenty-one thousand, one hundred thirty-seven".