12121222001001 has 8 divisors (see below), whose sum is σ = 16161684273504. Its totient is φ = 8080787197920.

The previous prime is 12121222000999. The next prime is 12121222001059. The reversal of 12121222001001 is 10010022212121.

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

It is not a de Polignac number, because 12121222001001 - 2¹ = 12121222000999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121222001201) 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, 5814691 + ... + 7619256.

It is an arithmetic number, because the mean of its divisors is an integer number (2020210534188).

Almost surely, 2^{12121222001001} is an apocalyptic number.

It is an amenable number.

12121222001001 is a deficient number, since it is larger than the sum of its proper divisors (4040462272503).

12121222001001 is a wasteful number, since it uses less digits than its factorization.

12121222001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13734711.

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

Adding to 12121222001001 its reverse (10010022212121), we get a palindrome (22131244213122).

It can be divided in two parts, 1212122 and 2001001, that added together give a palindrome (3213123).

The spelling of 12121222001001 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one thousand, one".