221202211122121 has 8 divisors (see below), whose sum is σ = 225059395217760. Its totient is φ = 217348626829152.

The previous prime is 221202211122103. The next prime is 221202211122163. The reversal of 221202211122121 is 121221112202122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221202211122121 - 2²¹ = 221202209024969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221202211122092 and 221202211122101.

It is not an unprimeable number, because it can be changed into a prime (221202211122821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899826700 + ... + 900072493.

It is an arithmetic number, because the mean of its divisors is an integer number (28132424402220).

Almost surely, 2^{221202211122121} is an apocalyptic number.

It is an amenable number.

221202211122121 is a deficient number, since it is larger than the sum of its proper divisors (3857184095639).

221202211122121 is a wasteful number, since it uses less digits than its factorization.

221202211122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799901335.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221202211122121 its reverse (121221112202122), we get a palindrome (342423323324243).

The spelling of 221202211122121 in words is "two hundred twenty-one trillion, two hundred two billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".