212001202020121 has 16 divisors (see below), whose sum is σ = 228603379314240. Its totient is φ = 195943502926080.

The previous prime is 212001202020077. The next prime is 212001202020173. The reversal of 212001202020121 is 121020202100212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212001202020121 - 2²¹ = 212001199922969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001202020095 and 212001202020104.

It is not an unprimeable number, because it can be changed into a prime (212001202020191) 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, 154809021 + ... + 156172453.

It is an arithmetic number, because the mean of its divisors is an integer number (14287711207140).

Almost surely, 2^{212001202020121} is an apocalyptic number.

It is an amenable number.

212001202020121 is a deficient number, since it is larger than the sum of its proper divisors (16602177294119).

212001202020121 is a wasteful number, since it uses less digits than its factorization.

212001202020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563096.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212001202020121 its reverse (121020202100212), we get a palindrome (333021404120333).

The spelling of 212001202020121 in words is "two hundred twelve trillion, one billion, two hundred two million, twenty thousand, one hundred twenty-one".