20012002101 has 32 divisors (see below), whose sum is σ = 36489125120. Its totient is φ = 10555780032.

The previous prime is 20012002091. The next prime is 20012002147. The reversal of 20012002101 is 10120021002.

It is not a de Polignac number, because 20012002101 - 2⁵ = 20012002069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012002181) 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 31 ways as a sum of consecutive naturals, for example, 4069990 + ... + 4074903.

It is an arithmetic number, because the mean of its divisors is an integer number (1140285160).

Almost surely, 2^20012002101 is an apocalyptic number.

20012002101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20012002101 is a deficient number, since it is larger than the sum of its proper divisors (16477123019).

20012002101 is a wasteful number, since it uses less digits than its factorization.

20012002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144922 (or 8144916 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012002101 its reverse (10120021002), we get a palindrome (30132023103).

The spelling of 20012002101 in words is "twenty billion, twelve million, two thousand, one hundred one".