20102220101 has 4 divisors (see below), whose sum is σ = 20111152704. Its totient is φ = 20093287500.

The previous prime is 20102220097. The next prime is 20102220107. The reversal of 20102220101 is 10102220102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102220101 - 2² = 20102220097 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 (20102220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4462925 + ... + 4467426.

It is an arithmetic number, because the mean of its divisors is an integer number (5027788176).

Almost surely, 2^20102220101 is an apocalyptic number.

It is an amenable number.

20102220101 is a deficient number, since it is larger than the sum of its proper divisors (8932603).

20102220101 is an equidigital number, since it uses as much as digits as its factorization.

20102220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932602.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20102220101 its reverse (10102220102), we get a palindrome (30204440203).

Subtracting from 20102220101 its reverse (10102220102), we obtain a palindrome (9999999999).

The spelling of 20102220101 in words is "twenty billion, one hundred two million, two hundred twenty thousand, one hundred one".