20101210210001 has 4 divisors (see below), whose sum is σ = 20159138770032. Its totient is φ = 20043281649972.

The previous prime is 20101210209961. The next prime is 20101210210049. The reversal of 20101210210001 is 10001201210102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20101210210001 - 2¹⁰ = 20101210208977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101210210801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28964279495 + ... + 28964280188.

It is an arithmetic number, because the mean of its divisors is an integer number (5039784692508).

Almost surely, 2^{20101210210001} is an apocalyptic number.

It is an amenable number.

20101210210001 is a deficient number, since it is larger than the sum of its proper divisors (57928560031).

20101210210001 is an equidigital number, since it uses as much as digits as its factorization.

20101210210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57928560030.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20101210210001 its reverse (10001201210102), we get a palindrome (30102411420103).

The spelling of 20101210210001 in words is "twenty trillion, one hundred one billion, two hundred ten million, two hundred ten thousand, one".