20102122102001 has 4 divisors (see below), whose sum is σ = 20301153014004. Its totient is φ = 19903091190000.

The previous prime is 20102122101953. The next prime is 20102122102039. The reversal of 20102122102001 is 10020122120102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18331678965601 + 1770443136400 = 4281551^2 + 1330580^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102122102001 - 2¹⁸ = 20102121839857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102122102201) 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, 99515455850 + ... + 99515456051.

It is an arithmetic number, because the mean of its divisors is an integer number (5075288253501).

Almost surely, 2^{20102122102001} is an apocalyptic number.

It is an amenable number.

20102122102001 is a deficient number, since it is larger than the sum of its proper divisors (199030912003).

20102122102001 is a wasteful number, since it uses less digits than its factorization.

20102122102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199030912002.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102122102001 its reverse (10020122120102), we get a palindrome (30122244222103).

The spelling of 20102122102001 in words is "twenty trillion, one hundred two billion, one hundred twenty-two million, one hundred two thousand, one".