12121210211001 has 32 divisors (see below), whose sum is σ = 17658084705408. Its totient is φ = 7364841200640.

The previous prime is 12121210210919. The next prime is 12121210211023. The reversal of 12121210211001 is 10011201212121.

It is a happy number.

It is not a de Polignac number, because 12121210211001 - 2¹¹ = 12121210208953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121210211041) 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, 14823490 + ... + 15619803.

It is an arithmetic number, because the mean of its divisors is an integer number (551815147044).

Almost surely, 2^{12121210211001} is an apocalyptic number.

It is an amenable number.

12121210211001 is a deficient number, since it is larger than the sum of its proper divisors (5536874494407).

12121210211001 is a wasteful number, since it uses less digits than its factorization.

12121210211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30443561.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12121210211001 its reverse (10011201212121), we get a palindrome (22132411423122).

The spelling of 12121210211001 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, one".