2002221997 has 2 divisors, whose sum is σ = 2002221998. Its totient is φ = 2002221996.

The previous prime is 2002221953. The next prime is 2002222007. The reversal of 2002221997 is 7991222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1615155721 + 387066276 = 40189^2 + 19674^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002221997 - 2¹¹ = 2002219949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002221097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001110998 + 1001110999.

It is an arithmetic number, because the mean of its divisors is an integer number (1001110999).

Almost surely, 2^2002221997 is an apocalyptic number.

It is an amenable number.

2002221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002221997 is an equidigital number, since it uses as much as digits as its factorization.

2002221997 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 square root of 2002221997 is about 44746.1953354696. The cubic root of 2002221997 is about 1260.3874673400.

Adding to 2002221997 its reverse (7991222002), we get a palindrome (9993443999).

The spelling of 2002221997 in words is "two billion, two million, two hundred twenty-one thousand, nine hundred ninety-seven".