212102112221121 has 32 divisors (see below), whose sum is σ = 286133950130688. Its totient is φ = 139744965201920.

The previous prime is 212102112221119. The next prime is 212102112221179. The reversal of 212102112221121 is 121122211201212.

It is a cyclic number.

It is not a de Polignac number, because 212102112221121 - 2¹ = 212102112221119 is a prime.

It is a super-2 number, since 2×212102112221121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212102112221221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459020626 + ... + 459482468.

It is an arithmetic number, because the mean of its divisors is an integer number (8941685941584).

Almost surely, 2^{212102112221121} is an apocalyptic number.

It is an amenable number.

212102112221121 is a deficient number, since it is larger than the sum of its proper divisors (74031837909567).

212102112221121 is a wasteful number, since it uses less digits than its factorization.

212102112221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466781.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212102112221121 its reverse (121122211201212), we get a palindrome (333224323422333).

The spelling of 212102112221121 in words is "two hundred twelve trillion, one hundred two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".