20102020101 has 16 divisors (see below), whose sum is σ = 29830512000. Its totient is φ = 13378963104.

The previous prime is 20102020097. The next prime is 20102020139. The reversal of 20102020101 is 10102020102.

It is not a de Polignac number, because 20102020101 - 2² = 20102020097 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102020901) 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, 605296 + ... + 637641.

It is an arithmetic number, because the mean of its divisors is an integer number (1864407000).

Almost surely, 2^20102020101 is an apocalyptic number.

It is an amenable number.

20102020101 is a deficient number, since it is larger than the sum of its proper divisors (9728491899).

20102020101 is a wasteful number, since it uses less digits than its factorization.

20102020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243545 (or 1243539 counting only the distinct ones).

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

Adding to 20102020101 its reverse (10102020102), we get a palindrome (30204040203).

Subtracting from 20102020101 its reverse (10102020102), we obtain a palindrome (9999999999).

The spelling of 20102020101 in words is "twenty billion, one hundred two million, twenty thousand, one hundred one".