212022212012121 has 16 divisors (see below), whose sum is σ = 323081678265344. Its totient is φ = 121155470092944.

The previous prime is 212022212012119. The next prime is 212022212012137. The reversal of 212022212012121 is 121210212220212.

It is not a de Polignac number, because 212022212012121 - 2¹ = 212022212012119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212022212012101) 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 15 ways as a sum of consecutive naturals, for example, 47485860 + ... + 51758586.

It is an arithmetic number, because the mean of its divisors is an integer number (20192604891584).

Almost surely, 2^{212022212012121} is an apocalyptic number.

212022212012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212022212012121 is a deficient number, since it is larger than the sum of its proper divisors (111059466253223).

212022212012121 is a wasteful number, since it uses less digits than its factorization.

212022212012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6635700.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212022212012121 its reverse (121210212220212), we get a palindrome (333232424232333).

The spelling of 212022212012121 in words is "two hundred twelve trillion, twenty-two billion, two hundred twelve million, twelve thousand, one hundred twenty-one".