212112010111021 has 4 divisors (see below), whose sum is σ = 212112040219200. Its totient is φ = 212111980002844.

The previous prime is 212112010110989. The next prime is 212112010111051. The reversal of 212112010111021 is 120111010211212.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212112010111021 - 2⁵ = 212112010110989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212112010110986 and 212112010111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112010111051) 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, 1812540 + ... + 20676298.

It is an arithmetic number, because the mean of its divisors is an integer number (53028010054800).

Almost surely, 2^{212112010111021} is an apocalyptic number.

It is an amenable number.

212112010111021 is a deficient number, since it is larger than the sum of its proper divisors (30108179).

212112010111021 is a wasteful number, since it uses less digits than its factorization.

212112010111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30108178.

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

Adding to 212112010111021 its reverse (120111010211212), we get a palindrome (332223020322233).

The spelling of 212112010111021 in words is "two hundred twelve trillion, one hundred twelve billion, ten million, one hundred eleven thousand, twenty-one".