20021001202101 has 8 divisors (see below), whose sum is σ = 26694741344544. Its totient is φ = 13347297597200.

The previous prime is 20021001202093. The next prime is 20021001202177. The reversal of 20021001202101 is 10120210012002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021001202101 - 2³ = 20021001202093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021001202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7829175 + ... + 10066676.

It is an arithmetic number, because the mean of its divisors is an integer number (3336842668068).

Almost surely, 2^{20021001202101} is an apocalyptic number.

It is an amenable number.

20021001202101 is a deficient number, since it is larger than the sum of its proper divisors (6673740142443).

20021001202101 is a wasteful number, since it uses less digits than its factorization.

20021001202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18268771.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021001202101 its reverse (10120210012002), we get a palindrome (30141211214103).

The spelling of 20021001202101 in words is "twenty trillion, twenty-one billion, one million, two hundred two thousand, one hundred one".