212203013121 has 12 divisors (see below), whose sum is σ = 334380505680. Its totient is φ = 128607886680.

The previous prime is 212203013119. The next prime is 212203013171. The reversal of 212203013121 is 121310302212.

212203013121 is a `hidden beast` number, since 21 + 220 + 301 + 3 + 121 = 666.

It is not a de Polignac number, because 212203013121 - 2¹ = 212203013119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212203013094 and 212203013103.

It is not an unprimeable number, because it can be changed into a prime (212203013171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1071732291 + ... + 1071732488.

It is an arithmetic number, because the mean of its divisors is an integer number (27865042140).

Almost surely, 2^212203013121 is an apocalyptic number.

It is an amenable number.

212203013121 is a deficient number, since it is larger than the sum of its proper divisors (122177492559).

212203013121 is a wasteful number, since it uses less digits than its factorization.

212203013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143464796 (or 2143464793 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212203013121 its reverse (121310302212), we get a palindrome (333513315333).

The spelling of 212203013121 in words is "two hundred twelve billion, two hundred three million, thirteen thousand, one hundred twenty-one".