212101121121201 has 40 divisors (see below), whose sum is σ = 352221841604864. Its totient is φ = 126313322732640.

The previous prime is 212101121121193. The next prime is 212101121121217. The reversal of 212101121121201 is 102121121101212.

It is a happy number.

212101121121201 is a `hidden beast` number, since 21 + 210 + 1 + 1 + 211 + 21 + 201 = 666.

It is not a de Polignac number, because 212101121121201 - 2³ = 212101121121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212101121121101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3248766811 + ... + 3248832096.

Almost surely, 2^{212101121121201} is an apocalyptic number.

It is an amenable number.

212101121121201 is a deficient number, since it is larger than the sum of its proper divisors (140120720483663).

212101121121201 is a wasteful number, since it uses less digits than its factorization.

212101121121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497598963 (or 6497598954 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212101121121201 its reverse (102121121101212), we get a palindrome (314222242222413).

The spelling of 212101121121201 in words is "two hundred twelve trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred one".