1210321020001 has 2 divisors, whose sum is σ = 1210321020002. Its totient is φ = 1210321020000.

The previous prime is 1210321019993. The next prime is 1210321020067. The reversal of 1210321020001 is 1000201230121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030324472401 + 179996547600 = 1015049^2 + 424260^2 .

It is an emirp because it is prime and its reverse (1000201230121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210321020001 - 2³ = 1210321019993 is a prime.

It is a super-2 number, since 2×1210321020001² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1210321027001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605160510000 + 605160510001.

It is an arithmetic number, because the mean of its divisors is an integer number (605160510001).

Almost surely, 2^{1210321020001} is an apocalyptic number.

It is an amenable number.

1210321020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210321020001 is an equidigital number, since it uses as much as digits as its factorization.

1210321020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1210321020001 its reverse (1000201230121), we get a palindrome (2210522250122).

The spelling of 1210321020001 in words is "one trillion, two hundred ten billion, three hundred twenty-one million, twenty thousand, one".