20012110202021 has 16 divisors (see below), whose sum is σ = 23254164792960. Its totient is φ = 16866050575680.

The previous prime is 20012110201949. The next prime is 20012110202039. The reversal of 20012110202021 is 12020201121002.

It is a cyclic number.

It is not a de Polignac number, because 20012110202021 - 2¹⁰ = 20012110200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012110201987 and 20012110202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012110202221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7108946 + ... + 9516371.

It is an arithmetic number, because the mean of its divisors is an integer number (1453385299560).

Almost surely, 2^{20012110202021} is an apocalyptic number.

It is an amenable number.

20012110202021 is a deficient number, since it is larger than the sum of its proper divisors (3242054590939).

20012110202021 is a wasteful number, since it uses less digits than its factorization.

20012110202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628204.

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

Adding to 20012110202021 its reverse (12020201121002), we get a palindrome (32032311323023).

The spelling of 20012110202021 in words is "twenty trillion, twelve billion, one hundred ten million, two hundred two thousand, twenty-one".