212020011121 has 4 divisors (see below), whose sum is σ = 212565050100. Its totient is φ = 211474972144.

The previous prime is 212020011113. The next prime is 212020011173. The reversal of 212020011121 is 121110020212.

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 141948097600 + 70071913521 = 376760^2 + 264711^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020011121 - 2³ = 212020011113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212020011101) 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, 272518906 + ... + 272519683.

It is an arithmetic number, because the mean of its divisors is an integer number (53141262525).

Almost surely, 2^212020011121 is an apocalyptic number.

It is an amenable number.

212020011121 is a deficient number, since it is larger than the sum of its proper divisors (545038979).

212020011121 is an equidigital number, since it uses as much as digits as its factorization.

212020011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545038978.

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

Adding to 212020011121 its reverse (121110020212), we get a palindrome (333130031333).

Subtracting from 212020011121 its reverse (121110020212), we obtain a palindrome (90909990909).

The spelling of 212020011121 in words is "two hundred twelve billion, twenty million, eleven thousand, one hundred twenty-one".