20012021101 has 16 divisors (see below), whose sum is σ = 20660649984. Its totient is φ = 19373136624.

The previous prime is 20012021093. The next prime is 20012021129. The reversal of 20012021101 is 10112021002.

It is a cyclic number.

It is not a de Polignac number, because 20012021101 - 2³ = 20012021093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012021131) 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 15 ways as a sum of consecutive naturals, for example, 5260266 + ... + 5264068.

It is an arithmetic number, because the mean of its divisors is an integer number (1291290624).

Almost surely, 2^20012021101 is an apocalyptic number.

It is an amenable number.

20012021101 is a deficient number, since it is larger than the sum of its proper divisors (648628883).

20012021101 is a wasteful number, since it uses less digits than its factorization.

20012021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20012021101 its reverse (10112021002), we get a palindrome (30124042103).

Subtracting from 20012021101 its reverse (10112021002), we obtain a palindrome (9900000099).

The spelling of 20012021101 in words is "twenty billion, twelve million, twenty-one thousand, one hundred one".