12211002121 has 8 divisors (see below), whose sum is σ = 12490849280. Its totient is φ = 11934025488.

The previous prime is 12211002109. The next prime is 12211002149. The reversal of 12211002121 is 12120011221.

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

It is a cyclic number.

It is not a de Polignac number, because 12211002121 - 2⁷ = 12211001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211006121) 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, 709026 + ... + 726043.

It is an arithmetic number, because the mean of its divisors is an integer number (1561356160).

Almost surely, 2^12211002121 is an apocalyptic number.

It is an amenable number.

12211002121 is a deficient number, since it is larger than the sum of its proper divisors (279847159).

12211002121 is a wasteful number, since it uses less digits than its factorization.

12211002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435263.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12211002121 its reverse (12120011221), we get a palindrome (24331013342).

It can be divided in two parts, 1221100 and 2121, that added together give a palindrome (1223221).

The spelling of 12211002121 in words is "twelve billion, two hundred eleven million, two thousand, one hundred twenty-one".