212021110000121 has 4 divisors (see below), whose sum is σ = 212104484406912. Its totient is φ = 211937735593332.

The previous prime is 212021110000111. The next prime is 212021110000159. The reversal of 212021110000121 is 121000011120212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021110000121 is a prime.

It is a super-4 number, since 4×212021110000121⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021110000096 and 212021110000105.

It is not an unprimeable number, because it can be changed into a prime (212021110000111) 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, 41687199581 + ... + 41687204666.

It is an arithmetic number, because the mean of its divisors is an integer number (53026121101728).

Almost surely, 2^{212021110000121} is an apocalyptic number.

It is an amenable number.

212021110000121 is a deficient number, since it is larger than the sum of its proper divisors (83374406791).

212021110000121 is an equidigital number, since it uses as much as digits as its factorization.

212021110000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83374406790.

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

Adding to 212021110000121 its reverse (121000011120212), we get a palindrome (333021121120333).

The spelling of 212021110000121 in words is "two hundred twelve trillion, twenty-one billion, one hundred ten million, one hundred twenty-one", and thus it is an aban number.