201211202102121 has 40 divisors (see below), whose sum is σ = 305066593687680. Its totient is φ = 132143846728608.

The previous prime is 201211202102101. The next prime is 201211202102129. The reversal of 201211202102121 is 121201202112102.

201211202102121 is a `hidden beast` number, since 2 + 0 + 121 + 120 + 210 + 212 + 1 = 666.

It is not a de Polignac number, because 201211202102121 - 2³⁷ = 201073763148649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201211202102094 and 201211202102103.

It is not an unprimeable number, because it can be changed into a prime (201211202102129) 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, 32655270 + ... + 38324783.

It is an arithmetic number, because the mean of its divisors is an integer number (7626664842192).

Almost surely, 2^{201211202102121} is an apocalyptic number.

It is an amenable number.

201211202102121 is a deficient number, since it is larger than the sum of its proper divisors (103855391585559).

201211202102121 is an equidigital number, since it uses as much as digits as its factorization.

201211202102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70980587 (or 70980578 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201211202102121 its reverse (121201202112102), we get a palindrome (322412404214223).

The spelling of 201211202102121 in words is "two hundred one trillion, two hundred eleven billion, two hundred two million, one hundred two thousand, one hundred twenty-one".