20123220101 has 4 divisors (see below), whose sum is σ = 20124153600. Its totient is φ = 20122286604.

The previous prime is 20123220083. The next prime is 20123220113. The reversal of 20123220101 is 10102232102.

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 20123220101 - 2⁶ = 20123220037 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 (20123220001) 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, 433631 + ... + 477788.

It is an arithmetic number, because the mean of its divisors is an integer number (5031038400).

Almost surely, 2^20123220101 is an apocalyptic number.

It is an amenable number.

20123220101 is a deficient number, since it is larger than the sum of its proper divisors (933499).

20123220101 is an equidigital number, since it uses as much as digits as its factorization.

20123220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933498.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20123220101 its reverse (10102232102), we get a palindrome (30225452203).

The spelling of 20123220101 in words is "twenty billion, one hundred twenty-three million, two hundred twenty thousand, one hundred one".