20101210210801 has 2 divisors, whose sum is σ = 20101210210802. Its totient is φ = 20101210210800.

The previous prime is 20101210210789. The next prime is 20101210210841. The reversal of 20101210210801 is 10801201210102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17300109235600 + 2801100975201 = 4159340^2 + 1673649^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101210210801 - 2²³ = 20101201822193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101210210841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050605105400 + 10050605105401.

It is an arithmetic number, because the mean of its divisors is an integer number (10050605105401).

Almost surely, 2^{20101210210801} is an apocalyptic number.

It is an amenable number.

20101210210801 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101210210801 is an equidigital number, since it uses as much as digits as its factorization.

20101210210801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20101210210801 its reverse (10801201210102), we get a palindrome (30902411420903).

The spelling of 20101210210801 in words is "twenty trillion, one hundred one billion, two hundred ten million, two hundred ten thousand, eight hundred one".