222201210121 has 4 divisors (see below), whose sum is σ = 242401320144. Its totient is φ = 202001100100.

The previous prime is 222201210109. The next prime is 222201210137. The reversal of 222201210121 is 121012102222.

It is a happy number.

222201210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-222201210121 is a prime.

It is a Duffinian number.

222201210121 is a modest number, since divided by 1210121 gives 2222 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 222201210095 and 222201210104.

It is not an unprimeable number, because it can be changed into a prime (222201210421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100054995 + ... + 10100055016.

It is an arithmetic number, because the mean of its divisors is an integer number (60600330036).

Almost surely, 2^222201210121 is an apocalyptic number.

It is an amenable number.

222201210121 is a deficient number, since it is larger than the sum of its proper divisors (20200110023).

222201210121 is a wasteful number, since it uses less digits than its factorization.

222201210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200110022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222201210121 its reverse (121012102222), we get a palindrome (343213312343).

The spelling of 222201210121 in words is "two hundred twenty-two billion, two hundred one million, two hundred ten thousand, one hundred twenty-one".