2001201210973 has 2 divisors, whose sum is σ = 2001201210974. Its totient is φ = 2001201210972.

The previous prime is 2001201210919. The next prime is 2001201210989. The reversal of 2001201210973 is 3790121021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1570001482009 + 431199728964 = 1252997^2 + 656658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001201210973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001201210373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000600605486 + 1000600605487.

It is an arithmetic number, because the mean of its divisors is an integer number (1000600605487).

Almost surely, 2^{2001201210973} is an apocalyptic number.

It is an amenable number.

2001201210973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001201210973 is an equidigital number, since it uses as much as digits as its factorization.

2001201210973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 2001201210973 its reverse (3790121021002), we get a palindrome (5791322231975).

The spelling of 2001201210973 in words is "two trillion, one billion, two hundred one million, two hundred ten thousand, nine hundred seventy-three".