12112021012121 has 4 divisors (see below), whose sum is σ = 12122435476752. Its totient is φ = 12101606547492.

The previous prime is 12112021012067. The next prime is 12112021012127. The reversal of 12112021012121 is 12121012021121.

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 12112021012121 - 2⁶ = 12112021012057 is a prime.

It is a super-2 number, since 2×12112021012121² (a number of 27 digits) contains 22 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 12112021012121.

It is not an unprimeable number, because it can be changed into a prime (12112021012127) 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, 5207230571 + ... + 5207232896.

It is an arithmetic number, because the mean of its divisors is an integer number (3030608869188).

Almost surely, 2^{12112021012121} is an apocalyptic number.

It is an amenable number.

12112021012121 is a deficient number, since it is larger than the sum of its proper divisors (10414464631).

12112021012121 is a wasteful number, since it uses less digits than its factorization.

12112021012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414464630.

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

Adding to 12112021012121 its reverse (12121012021121), we get a palindrome (24233033033242).

The spelling of 12112021012121 in words is "twelve trillion, one hundred twelve billion, twenty-one million, twelve thousand, one hundred twenty-one".