212120012122101 has 16 divisors (see below), whose sum is σ = 314327103846400. Its totient is φ = 141379486098624.

The previous prime is 212120012122097. The next prime is 212120012122129. The reversal of 212120012122101 is 101221210021212.

212120012122101 is a `hidden beast` number, since 2 + 121 + 200 + 121 + 221 + 0 + 1 = 666.

It is not a de Polignac number, because 212120012122101 - 2² = 212120012122097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120012122901) 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, 940310581 + ... + 940536138.

It is an arithmetic number, because the mean of its divisors is an integer number (19645443990400).

Almost surely, 2^{212120012122101} is an apocalyptic number.

It is an amenable number.

212120012122101 is a deficient number, since it is larger than the sum of its proper divisors (102207091724299).

212120012122101 is a wasteful number, since it uses less digits than its factorization.

212120012122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880850905 (or 1880850899 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212120012122101 its reverse (101221210021212), we get a palindrome (313341222143313).

The spelling of 212120012122101 in words is "two hundred twelve trillion, one hundred twenty billion, twelve million, one hundred twenty-two thousand, one hundred one".