12210000121 has 16 divisors (see below), whose sum is σ = 13695365376. Its totient is φ = 10789200000.

The previous prime is 12210000119. The next prime is 12210000137. The reversal of 12210000121 is 12100001221.

It is a cyclic number.

It is not a de Polignac number, because 12210000121 - 2¹ = 12210000119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210000098 and 12210000107.

It is not an unprimeable number, because it can be changed into a prime (12210000161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72271 + ... + 172171.

It is an arithmetic number, because the mean of its divisors is an integer number (855960336).

Almost surely, 2^12210000121 is an apocalyptic number.

12210000121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210000121 is a deficient number, since it is larger than the sum of its proper divisors (1485365255).

12210000121 is a wasteful number, since it uses less digits than its factorization.

12210000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100224.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12210000121 its reverse (12100001221), we get a palindrome (24310001342).

It can be divided in two parts, 1 and 2210000121, that added together give a palindrome (2210000122).

The spelling of 12210000121 in words is "twelve billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.