12021121220001 has 32 divisors (see below), whose sum is σ = 16563619860480. Its totient is φ = 7746931608000.

The previous prime is 12021121219973. The next prime is 12021121220011. The reversal of 12021121220001 is 10002212112021.

It is not a de Polignac number, because 12021121220001 - 2⁵ = 12021121219969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021121220011) 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, 387525070 + ... + 387556088.

It is an arithmetic number, because the mean of its divisors is an integer number (517613120640).

Almost surely, 2^{12021121220001} is an apocalyptic number.

It is an amenable number.

12021121220001 is a deficient number, since it is larger than the sum of its proper divisors (4542498640479).

12021121220001 is a wasteful number, since it uses less digits than its factorization.

12021121220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35557.

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

Adding to 12021121220001 its reverse (10002212112021), we get a palindrome (22023333332022).

The spelling of 12021121220001 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one".