12001211022121 has 8 divisors (see below), whose sum is σ = 12280356248864. Its totient is φ = 11722067945280.

The previous prime is 12001211022107. The next prime is 12001211022127. The reversal of 12001211022121 is 12122011210021.

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 12001211022121 - 2³⁷ = 11863772068649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001211022095 and 12001211022104.

It is not an unprimeable number, because it can be changed into a prime (12001211022127) 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, 18544561 + ... + 19180801.

It is an arithmetic number, because the mean of its divisors is an integer number (1535044531108).

Almost surely, 2^{12001211022121} is an apocalyptic number.

It is an amenable number.

12001211022121 is a deficient number, since it is larger than the sum of its proper divisors (279145226743).

12001211022121 is an equidigital number, since it uses as much as digits as its factorization.

12001211022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074951.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12001211022121 its reverse (12122011210021), we get a palindrome (24123222232142).

The spelling of 12001211022121 in words is "twelve trillion, one billion, two hundred eleven million, twenty-two thousand, one hundred twenty-one".