2001021202237 has 2 divisors, whose sum is σ = 2001021202238. Its totient is φ = 2001021202236.

The previous prime is 2001021202183. The next prime is 2001021202261. The reversal of 2001021202237 is 7322021201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1998069887961 + 2951314276 = 1413531^2 + 54326^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001021202237 - 2⁷ = 2001021202109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001021202267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000510601118 + 1000510601119.

It is an arithmetic number, because the mean of its divisors is an integer number (1000510601119).

Almost surely, 2^{2001021202237} is an apocalyptic number.

It is an amenable number.

2001021202237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001021202237 is an equidigital number, since it uses as much as digits as its factorization.

2001021202237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 2001021202237 its reverse (7322021201002), we get a palindrome (9323042403239).

The spelling of 2001021202237 in words is "two trillion, one billion, twenty-one million, two hundred two thousand, two hundred thirty-seven".