212000011210121 has 8 divisors (see below), whose sum is σ = 224725390813224. Its totient is φ = 199302941685760.

The previous prime is 212000011210111. The next prime is 212000011210133. The reversal of 212000011210121 is 121012110000212.

It can be written as a sum of positive squares in 4 ways, for example, as 37947928515721 + 174052082694400 = 6160189^2 + 13192880^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212000011210121 - 2²² = 212000007015817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212000011210096 and 212000011210105.

It is not an unprimeable number, because it can be changed into a prime (212000011210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7077504260 + ... + 7077534213.

It is an arithmetic number, because the mean of its divisors is an integer number (28090673851653).

Almost surely, 2^{212000011210121} is an apocalyptic number.

It is an amenable number.

212000011210121 is a deficient number, since it is larger than the sum of its proper divisors (12725379603103).

212000011210121 is a wasteful number, since it uses less digits than its factorization.

212000011210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155039371.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212000011210121 its reverse (121012110000212), we get a palindrome (333012121210333).

The spelling of 212000011210121 in words is "two hundred twelve trillion, eleven million, two hundred ten thousand, one hundred twenty-one".