212112020200121 has 4 divisors (see below), whose sum is σ = 215277871247952. Its totient is φ = 208946169152292.

The previous prime is 212112020200097. The next prime is 212112020200151. The reversal of 212112020200121 is 121002020211212.

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 212112020200121 - 2⁶ = 212112020200057 is a prime.

It is a super-2 number, since 2×212112020200121² (a number of 29 digits) contains 22 as substring.

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 212112020200121.

It is not an unprimeable number, because it can be changed into a prime (212112020200151) 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, 1582925523815 + ... + 1582925523948.

It is an arithmetic number, because the mean of its divisors is an integer number (53819467811988).

Almost surely, 2^{212112020200121} is an apocalyptic number.

It is an amenable number.

212112020200121 is a deficient number, since it is larger than the sum of its proper divisors (3165851047831).

212112020200121 is an equidigital number, since it uses as much as digits as its factorization.

212112020200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165851047830.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212112020200121 its reverse (121002020211212), we get a palindrome (333114040411333).

The spelling of 212112020200121 in words is "two hundred twelve trillion, one hundred twelve billion, twenty million, two hundred thousand, one hundred twenty-one".