212010020121 has 16 divisors (see below), whose sum is σ = 292473567360. Its totient is φ = 136444775040.

The previous prime is 212010020113. The next prime is 212010020137. The reversal of 212010020121 is 121020010212.

It is not a de Polignac number, because 212010020121 - 2³ = 212010020113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212010020097 and 212010020106.

It is not an unprimeable number, because it can be changed into a prime (212010020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374916 + ... + 751386.

It is an arithmetic number, because the mean of its divisors is an integer number (18279597960).

Almost surely, 2^212010020121 is an apocalyptic number.

It is an amenable number.

212010020121 is a deficient number, since it is larger than the sum of its proper divisors (80463547239).

212010020121 is a wasteful number, since it uses less digits than its factorization.

212010020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382976.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212010020121 its reverse (121020010212), we get a palindrome (333030030333).

Subtracting from 212010020121 its reverse (121020010212), we obtain a palindrome (90990009909).

The spelling of 212010020121 in words is "two hundred twelve billion, ten million, twenty thousand, one hundred twenty-one".