212030113121 has 4 divisors (see below), whose sum is σ = 212032977600. Its totient is φ = 212027248644.

The previous prime is 212030113079. The next prime is 212030113147. The reversal of 212030113121 is 121311030212.

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-212030113121 is a prime.

It is a super-4 number, since 4×212030113121⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212030113121.

It is not an unprimeable number, because it can be changed into a prime (212030113171) 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, 1318181 + ... + 1470258.

It is an arithmetic number, because the mean of its divisors is an integer number (53008244400).

Almost surely, 2^212030113121 is an apocalyptic number.

It is an amenable number.

212030113121 is a deficient number, since it is larger than the sum of its proper divisors (2864479).

212030113121 is an equidigital number, since it uses as much as digits as its factorization.

212030113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864478.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212030113121 its reverse (121311030212), we get a palindrome (333341143333).

The spelling of 212030113121 in words is "two hundred twelve billion, thirty million, one hundred thirteen thousand, one hundred twenty-one".