2002021771 has 2 divisors, whose sum is σ = 2002021772. Its totient is φ = 2002021770.

The previous prime is 2002021753. The next prime is 2002021817. The reversal of 2002021771 is 1771202002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2002021771 - 2¹⁷ = 2001890699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002061771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001010885 + 1001010886.

It is an arithmetic number, because the mean of its divisors is an integer number (1001010886).

Almost surely, 2^2002021771 is an apocalyptic number.

2002021771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002021771 is an equidigital number, since it uses as much as digits as its factorization.

2002021771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 2002021771 is about 44743.9579273001. The cubic root of 2002021771 is about 1260.3454522264.

Adding to 2002021771 its reverse (1771202002), we get a palindrome (3773223773).

The spelling of 2002021771 in words is "two billion, two million, twenty-one thousand, seven hundred seventy-one".