212202201210121 has 4 divisors (see below), whose sum is σ = 212455123977600. Its totient is φ = 211949278442644.

The previous prime is 212202201210101. The next prime is 212202201210179. The reversal of 212202201210121 is 121012102202212.

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 212202201210121 - 2⁵ = 212202201210089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212202201210101) 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, 126461382481 + ... + 126461384158.

It is an arithmetic number, because the mean of its divisors is an integer number (53113780994400).

Almost surely, 2^{212202201210121} is an apocalyptic number.

It is an amenable number.

212202201210121 is a deficient number, since it is larger than the sum of its proper divisors (252922767479).

212202201210121 is an equidigital number, since it uses as much as digits as its factorization.

212202201210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252922767478.

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

Adding to 212202201210121 its reverse (121012102202212), we get a palindrome (333214303412333).

The spelling of 212202201210121 in words is "two hundred twelve trillion, two hundred two billion, two hundred one million, two hundred ten thousand, one hundred twenty-one".