201212220121121 has 16 divisors (see below), whose sum is σ = 220432574573376. Its totient is φ = 182146708800000.

The previous prime is 201212220121067. The next prime is 201212220121127. The reversal of 201212220121121 is 121121022212102.

It is a cyclic number.

It is not a de Polignac number, because 201212220121121 - 2¹⁴ = 201212220104737 is a prime.

It is a super-2 number, since 2×201212220121121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201212220121093 and 201212220121102.

It is not an unprimeable number, because it can be changed into a prime (201212220121127) 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, 30393566 + ... + 36416936.

It is an arithmetic number, because the mean of its divisors is an integer number (13777035910836).

Almost surely, 2^{201212220121121} is an apocalyptic number.

It is an amenable number.

201212220121121 is a deficient number, since it is larger than the sum of its proper divisors (19220354452255).

201212220121121 is a wasteful number, since it uses less digits than its factorization.

201212220121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036224.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212220121121 its reverse (121121022212102), we get a palindrome (322333242333223).

The spelling of 201212220121121 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".