20022100011121 has 4 divisors (see below), whose sum is σ = 21562261550452. Its totient is φ = 18481938471792.

The previous prime is 20022100011119. The next prime is 20022100011139. The reversal of 20022100011121 is 12111000122002.

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 2724361518096 + 17297738493025 = 1650564^2 + 4159055^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022100011121 - 2¹ = 20022100011119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1540161539317 = 20022100011121 / (2 + 0 + 0 + 2 + 2 + 1 + 0 + 0 + 0 + 1 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022100011101) 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, 770080769646 + ... + 770080769671.

It is an arithmetic number, because the mean of its divisors is an integer number (5390565387613).

Almost surely, 2^{20022100011121} is an apocalyptic number.

It is an amenable number.

20022100011121 is a deficient number, since it is larger than the sum of its proper divisors (1540161539331).

20022100011121 is a wasteful number, since it uses less digits than its factorization.

20022100011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540161539330.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20022100011121 its reverse (12111000122002), we get a palindrome (32133100133123).

The spelling of 20022100011121 in words is "twenty trillion, twenty-two billion, one hundred million, eleven thousand, one hundred twenty-one".