212020121010121 has 4 divisors (see below), whose sum is σ = 212020298626500. Its totient is φ = 212019943393744.

The previous prime is 212020121010119. The next prime is 212020121010143. The reversal of 212020121010121 is 121010121020212.

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 195891375054400 + 16128745955721 = 13996120^2 + 4016061^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020121010121 - 2¹ = 212020121010119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020121010095 and 212020121010104.

It is not an unprimeable number, because it can be changed into a prime (212020121010161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87005446 + ... + 89409103.

It is an arithmetic number, because the mean of its divisors is an integer number (53005074656625).

Almost surely, 2^{212020121010121} is an apocalyptic number.

It is an amenable number.

212020121010121 is a deficient number, since it is larger than the sum of its proper divisors (177616379).

212020121010121 is a wasteful number, since it uses less digits than its factorization.

212020121010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177616378.

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

Adding to 212020121010121 its reverse (121010121020212), we get a palindrome (333030242030333).

The spelling of 212020121010121 in words is "two hundred twelve trillion, twenty billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".