212121230111101 has 4 divisors (see below), whose sum is σ = 212122675550272. Its totient is φ = 212119784671932.

The previous prime is 212121230110967. The next prime is 212121230111243. The reversal of 212121230111101 is 101111032121212.

212121230111101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 212121230111101 - 2¹¹ = 212121230109053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121230111501) 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, 722499435 + ... + 722792968.

It is an arithmetic number, because the mean of its divisors is an integer number (53030668887568).

Almost surely, 2^{212121230111101} is an apocalyptic number.

It is an amenable number.

212121230111101 is a deficient number, since it is larger than the sum of its proper divisors (1445439171).

212121230111101 is a wasteful number, since it uses less digits than its factorization.

212121230111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445439170.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 212121230111101 its reverse (101111032121212), we get a palindrome (313232262232313).

The spelling of 212121230111101 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred thirty million, one hundred eleven thousand, one hundred one".