2021631071 has 2 divisors, whose sum is σ = 2021631072. Its totient is φ = 2021631070.

The previous prime is 2021631019. The next prime is 2021631077. The reversal of 2021631071 is 1701361202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021631071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021631077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010815535 + 1010815536.

It is an arithmetic number, because the mean of its divisors is an integer number (1010815536).

Almost surely, 2^2021631071 is an apocalyptic number.

2021631071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021631071 is an equidigital number, since it uses as much as digits as its factorization.

2021631071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2021631071 is about 44962.5518737538. The cubic root of 2021631071 is about 1264.4470122796.

Adding to 2021631071 its reverse (1701361202), we get a palindrome (3722992273).

The spelling of 2021631071 in words is "two billion, twenty-one million, six hundred thirty-one thousand, seventy-one".