20201020101021 has 8 divisors (see below), whose sum is σ = 26936899289824. Its totient is φ = 13466243823120.

The previous prime is 20201020101019. The next prime is 20201020101061. The reversal of 20201020101021 is 12010102010202.

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

It is not a de Polignac number, because 20201020101021 - 2¹ = 20201020101019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201020100988 and 20201020101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201020101061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275684986 + ... + 275758251.

It is an arithmetic number, because the mean of its divisors is an integer number (3367112411228).

Almost surely, 2^{20201020101021} is an apocalyptic number.

It is an amenable number.

20201020101021 is a deficient number, since it is larger than the sum of its proper divisors (6735879188803).

20201020101021 is a wasteful number, since it uses less digits than its factorization.

20201020101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551455451.

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

Adding to 20201020101021 its reverse (12010102010202), we get a palindrome (32211122111223).

The spelling of 20201020101021 in words is "twenty trillion, two hundred one billion, twenty million, one hundred one thousand, twenty-one".