12102222201021 has 6 divisors (see below), whose sum is σ = 17480987623710. Its totient is φ = 8068148134008.

The previous prime is 12102222200987. The next prime is 12102222201053. The reversal of 12102222201021 is 12010222220121.

It is a happy number.

12102222201021 is a `hidden beast` number, since 1 + 210 + 222 + 220 + 10 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8148940983225 + 3953281217796 = 2854635^2 + 1988286^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12102222201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102222200985 and 12102222201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102222203021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672345677826 + ... + 672345677843.

It is an arithmetic number, because the mean of its divisors is an integer number (2913497937285).

Almost surely, 2^{12102222201021} is an apocalyptic number.

It is an amenable number.

12102222201021 is a deficient number, since it is larger than the sum of its proper divisors (5378765422689).

12102222201021 is a wasteful number, since it uses less digits than its factorization.

12102222201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344691355675 (or 1344691355672 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12102222201021 its reverse (12010222220121), we get a palindrome (24112444421142).

The spelling of 12102222201021 in words is "twelve trillion, one hundred two billion, two hundred twenty-two million, two hundred one thousand, twenty-one".