20122121023 has 4 divisors (see below), whose sum is σ = 20122459128. Its totient is φ = 20121782920.

The previous prime is 20122121017. The next prime is 20122121027. The reversal of 20122121023 is 32012122102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122121023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122120988 and 20122121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122121027) 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, 53413 + ... + 207598.

It is an arithmetic number, because the mean of its divisors is an integer number (5030614782).

Almost surely, 2^20122121023 is an apocalyptic number.

20122121023 is a deficient number, since it is larger than the sum of its proper divisors (338105).

20122121023 is an equidigital number, since it uses as much as digits as its factorization.

20122121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338104.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20122121023 its reverse (32012122102), we get a palindrome (52134243125).

The spelling of 20122121023 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty-three".