212212102200121 has 4 divisors (see below), whose sum is σ = 212212556241552. Its totient is φ = 212211648158692.

The previous prime is 212212102200101. The next prime is 212212102200139. The reversal of 212212102200121 is 121002201212212.

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 212212102200121 - 2¹¹ = 212212102198073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212212102200101) 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, 226318915 + ... + 227254648.

It is an arithmetic number, because the mean of its divisors is an integer number (53053139060388).

Almost surely, 2^{212212102200121} is an apocalyptic number.

It is an amenable number.

212212102200121 is a deficient number, since it is larger than the sum of its proper divisors (454041431).

212212102200121 is an equidigital number, since it uses as much as digits as its factorization.

212212102200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454041430.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212212102200121 its reverse (121002201212212), we get a palindrome (333214303412333).

The spelling of 212212102200121 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred two million, two hundred thousand, one hundred twenty-one".