20123220000101 has 4 divisors (see below), whose sum is σ = 20123308012812. Its totient is φ = 20123131987392.

The previous prime is 20123220000089. The next prime is 20123220000151. The reversal of 20123220000101 is 10100002232102.

It is a happy number.

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 14655919173025 + 5467300827076 = 3828305^2 + 2338226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123220000101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123220000151) 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, 43662500 + ... + 44120973.

It is an arithmetic number, because the mean of its divisors is an integer number (5030827003203).

Almost surely, 2^{20123220000101} is an apocalyptic number.

It is an amenable number.

20123220000101 is a deficient number, since it is larger than the sum of its proper divisors (88012711).

20123220000101 is an equidigital number, since it uses as much as digits as its factorization.

20123220000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88012710.

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

Adding to 20123220000101 its reverse (10100002232102), we get a palindrome (30223222232203).

The spelling of 20123220000101 in words is "twenty trillion, one hundred twenty-three billion, two hundred twenty million, one hundred one", and thus it is an aban number.