12102111222121 has 8 divisors (see below), whose sum is σ = 12108175720200. Its totient is φ = 12096047112960.

The previous prime is 12102111222029. The next prime is 12102111222139. The reversal of 12102111222121 is 12122211120121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3804606291600 + 8297504930521 = 1950540^2 + 2880539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12102111222121 is a prime.

It is a super-2 number, since 2×12102111222121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102111022121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77445415 + ... + 77601523.

It is an arithmetic number, because the mean of its divisors is an integer number (1513521965025).

Almost surely, 2^{12102111222121} is an apocalyptic number.

It is an amenable number.

12102111222121 is a deficient number, since it is larger than the sum of its proper divisors (6064498079).

12102111222121 is a wasteful number, since it uses less digits than its factorization.

12102111222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194459.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12102111222121 its reverse (12122211120121), we get a palindrome (24224322342242).

The spelling of 12102111222121 in words is "twelve trillion, one hundred two billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".