212020112010121 has 4 divisors (see below), whose sum is σ = 224491883304852. Its totient is φ = 199548340715392.

The previous prime is 212020112010079. The next prime is 212020112010139. The reversal of 212020112010121 is 121010211020212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71371897379721 + 140648214630400 = 8448189^2 + 11859520^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020112010121 - 2¹⁵ = 212020111977353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020112010095 and 212020112010104.

It is not an unprimeable number, because it can be changed into a prime (212020112010221) 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 3 ways as a sum of consecutive naturals, for example, 6235885647340 + ... + 6235885647373.

It is an arithmetic number, because the mean of its divisors is an integer number (56122970826213).

Almost surely, 2^{212020112010121} is an apocalyptic number.

It is an amenable number.

212020112010121 is a deficient number, since it is larger than the sum of its proper divisors (12471771294731).

212020112010121 is a wasteful number, since it uses less digits than its factorization.

212020112010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12471771294730.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212020112010121 its reverse (121010211020212), we get a palindrome (333030323030333).

The spelling of 212020112010121 in words is "two hundred twelve trillion, twenty billion, one hundred twelve million, ten thousand, one hundred twenty-one".