21031010203001 has 2 divisors, whose sum is σ = 21031010203002. Its totient is φ = 21031010203000.

The previous prime is 21031010202997. The next prime is 21031010203061. The reversal of 21031010203001 is 10030201013012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15143180747776 + 5887829455225 = 3891424^2 + 2426485^2 .

It is a cyclic number.

It is not a de Polignac number, because 21031010203001 - 2² = 21031010202997 is a prime.

It is a super-3 number, since 3×21031010203001³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21031010203061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515505101500 + 10515505101501.

It is an arithmetic number, because the mean of its divisors is an integer number (10515505101501).

Almost surely, 2^{21031010203001} is an apocalyptic number.

It is an amenable number.

21031010203001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031010203001 is an equidigital number, since it uses as much as digits as its factorization.

21031010203001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21031010203001 its reverse (10030201013012), we get a palindrome (31061211216013).

The spelling of 21031010203001 in words is "twenty-one trillion, thirty-one billion, ten million, two hundred three thousand, one".