12222010121 has 4 divisors (see below), whose sum is σ = 12616268544. Its totient is φ = 11827751700.

The previous prime is 12222010117. The next prime is 12222010123. The reversal of 12222010121 is 12101022221.

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 an emirpimes, since its reverse is a distinct semiprime: 12101022221 = 193 ⋅62699597.

It is a cyclic number.

It is not a de Polignac number, because 12222010121 - 2² = 12222010117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12222010096 and 12222010105.

It is not an unprimeable number, because it can be changed into a prime (12222010123) 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, 197129165 + ... + 197129226.

It is an arithmetic number, because the mean of its divisors is an integer number (3154067136).

Almost surely, 2^12222010121 is an apocalyptic number.

It is an amenable number.

12222010121 is a deficient number, since it is larger than the sum of its proper divisors (394258423).

12222010121 is an equidigital number, since it uses as much as digits as its factorization.

12222010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394258422.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12222010121 its reverse (12101022221), we get a palindrome (24323032342).

The spelling of 12222010121 in words is "twelve billion, two hundred twenty-two million, ten thousand, one hundred twenty-one".