12210001112121 has 16 divisors (see below), whose sum is σ = 16352912452800. Its totient is φ = 8103553167168.

The previous prime is 12210001112083. The next prime is 12210001112173. The reversal of 12210001112121 is 12121110001221.

It is a happy number.

It is not a de Polignac number, because 12210001112121 - 2³⁸ = 11935123205177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12210001112121.

It is not an unprimeable number, because it can be changed into a prime (12210001112521) 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, 5218710 + ... + 7187136.

It is an arithmetic number, because the mean of its divisors is an integer number (1022057028300).

Almost surely, 2^{12210001112121} is an apocalyptic number.

It is an amenable number.

12210001112121 is a deficient number, since it is larger than the sum of its proper divisors (4142911340679).

12210001112121 is a wasteful number, since it uses less digits than its factorization.

12210001112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977688.

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

Adding to 12210001112121 its reverse (12121110001221), we get a palindrome (24331111113342).

The spelling of 12210001112121 in words is "twelve trillion, two hundred ten billion, one million, one hundred twelve thousand, one hundred twenty-one".