20102210210101 has 4 divisors (see below), whose sum is σ = 20102661614412. Its totient is φ = 20101758805792.

The previous prime is 20102210210083. The next prime is 20102210210111. The reversal of 20102210210101 is 10101201220102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12752683788100 + 7349526422001 = 3571090^2 + 2711001^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102210210101 - 2²¹ = 20102208112949 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 (20102210210111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225635350 + ... + 225724423.

It is an arithmetic number, because the mean of its divisors is an integer number (5025665403603).

Almost surely, 2^{20102210210101} is an apocalyptic number.

It is an amenable number.

20102210210101 is a deficient number, since it is larger than the sum of its proper divisors (451404311).

20102210210101 is an equidigital number, since it uses as much as digits as its factorization.

20102210210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451404310.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20102210210101 its reverse (10101201220102), we get a palindrome (30203411430203).

The spelling of 20102210210101 in words is "twenty trillion, one hundred two billion, two hundred ten million, two hundred ten thousand, one hundred one".