212002011121 has 4 divisors (see below), whose sum is σ = 212076741492. Its totient is φ = 211927280752.

The previous prime is 212002011103. The next prime is 212002011127. The reversal of 212002011121 is 121110200212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15753011121 + 196249000000 = 125511^2 + 443000^2 .

It is a cyclic number.

It is not a de Polignac number, because 212002011121 - 2⁹ = 212002010609 is a prime.

It is a super-3 number, since 3×212002011121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212002011127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37360930 + ... + 37366603.

It is an arithmetic number, because the mean of its divisors is an integer number (53019185373).

Almost surely, 2^212002011121 is an apocalyptic number.

It is an amenable number.

212002011121 is a deficient number, since it is larger than the sum of its proper divisors (74730371).

212002011121 is an equidigital number, since it uses as much as digits as its factorization.

212002011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74730370.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212002011121 its reverse (121110200212), we get a palindrome (333112211333).

The spelling of 212002011121 in words is "two hundred twelve billion, two million, eleven thousand, one hundred twenty-one".