12121922121 has 8 divisors (see below), whose sum is σ = 16187091360. Its totient is φ = 8069017152.

The previous prime is 12121922053. The next prime is 12121922143. The reversal of 12121922121 is 12122912121.

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

It is not a de Polignac number, because 12121922121 - 2⁷ = 12121921993 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12121922091 and 12121922100.

It is not an unprimeable number, because it can be changed into a prime (12121922171) 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, 3063760 + ... + 3067713.

It is an arithmetic number, because the mean of its divisors is an integer number (2023386420).

Almost surely, 2^12121922121 is an apocalyptic number.

It is an amenable number.

12121922121 is a deficient number, since it is larger than the sum of its proper divisors (4065169239).

12121922121 is an equidigital number, since it uses as much as digits as its factorization.

12121922121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132135.

The product of its digits is 288, while the sum is 24.

The spelling of 12121922121 in words is "twelve billion, one hundred twenty-one million, nine hundred twenty-two thousand, one hundred twenty-one".