202220221210121 has 16 divisors (see below), whose sum is σ = 208531064467728. Its totient is φ = 196033901184000.

The previous prime is 202220221210103. The next prime is 202220221210123. The reversal of 202220221210121 is 121012122022202.

It can be written as a sum of positive squares in 8 ways, for example, as 52837779481600 + 149382441728521 = 7268960^2 + 12222211^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220221210121 - 2⁶ = 202220221210057 is a prime.

It is a super-3 number, since 3×202220221210121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202220221210093 and 202220221210102.

It is not an unprimeable number, because it can be changed into a prime (202220221210123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99088910 + ... + 101109111.

It is an arithmetic number, because the mean of its divisors is an integer number (13033191529233).

Almost surely, 2^{202220221210121} is an apocalyptic number.

It is an amenable number.

202220221210121 is a deficient number, since it is larger than the sum of its proper divisors (6310843257607).

202220221210121 is a wasteful number, since it uses less digits than its factorization.

202220221210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200198332.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202220221210121 its reverse (121012122022202), we get a palindrome (323232343232323).

The spelling of 202220221210121 in words is "two hundred two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".