20200112111021 has 4 divisors (see below), whose sum is σ = 20200967093472. Its totient is φ = 20199257128572.

The previous prime is 20200112110993. The next prime is 20200112111051. The reversal of 20200112111021 is 12011121100202.

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 20200112111021 - 2¹⁸ = 20200111848877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200112110987 and 20200112111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200112111051) 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, 427455785 + ... + 427503038.

It is an arithmetic number, because the mean of its divisors is an integer number (5050241773368).

Almost surely, 2^{20200112111021} is an apocalyptic number.

It is an amenable number.

20200112111021 is a deficient number, since it is larger than the sum of its proper divisors (854982451).

20200112111021 is an equidigital number, since it uses as much as digits as its factorization.

20200112111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854982450.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20200112111021 its reverse (12011121100202), we get a palindrome (32211233211223).

The spelling of 20200112111021 in words is "twenty trillion, two hundred billion, one hundred twelve million, one hundred eleven thousand, twenty-one".