12122221021001 has 32 divisors (see below), whose sum is σ = 15060831448320. Its totient is φ = 9500473322496.

The previous prime is 12122221020979. The next prime is 12122221021021. The reversal of 12122221021001 is 10012012222121.

It is a de Polignac number, because none of the positive numbers 2^k-12122221021001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122221021021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90068165 + ... + 90202653.

It is an arithmetic number, because the mean of its divisors is an integer number (470650982760).

Almost surely, 2^{12122221021001} is an apocalyptic number.

It is an amenable number.

12122221021001 is a deficient number, since it is larger than the sum of its proper divisors (2938610427319).

12122221021001 is a wasteful number, since it uses less digits than its factorization.

12122221021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143873.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12122221021001 its reverse (10012012222121), we get a palindrome (22134233243122).

The spelling of 12122221021001 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, one".