212110021210121 has 16 divisors (see below), whose sum is σ = 216955086128640. Its totient is φ = 207313185170880.

The previous prime is 212110021210079. The next prime is 212110021210193. The reversal of 212110021210121 is 121012120011212.

It is not a de Polignac number, because 212110021210121 - 2⁶ = 212110021210057 is a prime.

It is a super-2 number, since 2×212110021210121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212110021210121.

It is not an unprimeable number, because it can be changed into a prime (212110021210921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10901141 + ... + 23303538.

It is an arithmetic number, because the mean of its divisors is an integer number (13559692883040).

Almost surely, 2^{212110021210121} is an apocalyptic number.

It is an amenable number.

212110021210121 is a deficient number, since it is larger than the sum of its proper divisors (4845064918519).

212110021210121 is a wasteful number, since it uses less digits than its factorization.

212110021210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34205384.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212110021210121 its reverse (121012120011212), we get a palindrome (333122141221333).

The spelling of 212110021210121 in words is "two hundred twelve trillion, one hundred ten billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".