2021334434477 has 2 divisors, whose sum is σ = 2021334434478. Its totient is φ = 2021334434476.

The previous prime is 2021334434419. The next prime is 2021334434489. The reversal of 2021334434477 is 7744344331202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2014826946916 + 6507487561 = 1419446^2 + 80669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021334434477 - 2⁸ = 2021334434221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021334404477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010667217238 + 1010667217239.

It is an arithmetic number, because the mean of its divisors is an integer number (1010667217239).

Almost surely, 2^{2021334434477} is an apocalyptic number.

It is an amenable number.

2021334434477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021334434477 is an equidigital number, since it uses as much as digits as its factorization.

2021334434477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 44.

Adding to 2021334434477 its reverse (7744344331202), we get a palindrome (9765678765679).

The spelling of 2021334434477 in words is "two trillion, twenty-one billion, three hundred thirty-four million, four hundred thirty-four thousand, four hundred seventy-seven".