212002011121121 has 8 divisors (see below), whose sum is σ = 228310020340584. Its totient is φ = 195694025074560.

The previous prime is 212002011121111. The next prime is 212002011121171. The reversal of 212002011121121 is 121121110200212.

It can be written as a sum of positive squares in 4 ways, for example, as 26618428083025 + 185383583038096 = 5159305^2 + 13615564^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002011121121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212002011121121.

It is not an unprimeable number, because it can be changed into a prime (212002011121111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16339775 + ... + 26286731.

It is an arithmetic number, because the mean of its divisors is an integer number (28538752542573).

Almost surely, 2^{212002011121121} is an apocalyptic number.

It is an amenable number.

212002011121121 is a deficient number, since it is larger than the sum of its proper divisors (16308009219463).

212002011121121 is a wasteful number, since it uses less digits than its factorization.

212002011121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11586451.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212002011121121 its reverse (121121110200212), we get a palindrome (333123121321333).

The spelling of 212002011121121 in words is "two hundred twelve trillion, two billion, eleven million, one hundred twenty-one thousand, one hundred twenty-one".