20012211022123 has 4 divisors (see below), whose sum is σ = 20012890883440. Its totient is φ = 20011531160808.

The previous prime is 20012211022103. The next prime is 20012211022201. The reversal of 20012211022123 is 32122011221002.

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

It is a cyclic number.

It is not a de Polignac number, because 20012211022123 - 2¹³ = 20012211013931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012211022123.

It is not an unprimeable number, because it can be changed into a prime (20012211022103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339886503 + ... + 339945376.

It is an arithmetic number, because the mean of its divisors is an integer number (5003222720860).

Almost surely, 2^{20012211022123} is an apocalyptic number.

20012211022123 is a deficient number, since it is larger than the sum of its proper divisors (679861317).

20012211022123 is an equidigital number, since it uses as much as digits as its factorization.

20012211022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679861316.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20012211022123 its reverse (32122011221002), we get a palindrome (52134222243125).

The spelling of 20012211022123 in words is "twenty trillion, twelve billion, two hundred eleven million, twenty-two thousand, one hundred twenty-three".