202201210012121 has 4 divisors (see below), whose sum is σ = 204164328556032. Its totient is φ = 200238091468212.

The previous prime is 202201210012099. The next prime is 202201210012147. The reversal of 202201210012121 is 121210012102202.

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 202201210012121 - 2¹⁴ = 202201209995737 is a prime.

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 202201210012121.

It is not an unprimeable number, because it can be changed into a prime (202201210012181) 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, 981559271801 + ... + 981559272006.

It is an arithmetic number, because the mean of its divisors is an integer number (51041082139008).

Almost surely, 2^{202201210012121} is an apocalyptic number.

It is an amenable number.

202201210012121 is a deficient number, since it is larger than the sum of its proper divisors (1963118543911).

202201210012121 is a wasteful number, since it uses less digits than its factorization.

202201210012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963118543910.

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

Adding to 202201210012121 its reverse (121210012102202), we get a palindrome (323411222114323).

The spelling of 202201210012121 in words is "two hundred two trillion, two hundred one billion, two hundred ten million, twelve thousand, one hundred twenty-one".