12121002221001 has 16 divisors (see below), whose sum is σ = 16165992525696. Its totient is φ = 8078340381696.

The previous prime is 12121002220993. The next prime is 12121002221089. The reversal of 12121002221001 is 10012220012121.

It is not a de Polignac number, because 12121002221001 - 2³ = 12121002220993 is a prime.

It is a super-2 number, since 2×12121002221001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121002221701) 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, 168070716 + ... + 168142818.

It is an arithmetic number, because the mean of its divisors is an integer number (1010374532856).

Almost surely, 2^{12121002221001} is an apocalyptic number.

It is an amenable number.

12121002221001 is a deficient number, since it is larger than the sum of its proper divisors (4044990304695).

12121002221001 is an equidigital number, since it uses as much as digits as its factorization.

12121002221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87472.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121002221001 its reverse (10012220012121), we get a palindrome (22133222233122).

The spelling of 12121002221001 in words is "twelve trillion, one hundred twenty-one billion, two million, two hundred twenty-one thousand, one".