12000001212121 has 8 divisors (see below), whose sum is σ = 12923216707520. Its totient is φ = 11076805499472.

The previous prime is 12000001212119. The next prime is 12000001212139. The reversal of 12000001212121 is 12121210000021.

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

It is a cyclic number.

It is not a de Polignac number, because 12000001212121 - 2¹ = 12000001212119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000001272121) 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, 3673725 + ... + 6123418.

It is an arithmetic number, because the mean of its divisors is an integer number (1615402088440).

Almost surely, 2^{12000001212121} is an apocalyptic number.

It is an amenable number.

12000001212121 is a deficient number, since it is larger than the sum of its proper divisors (923215495399).

12000001212121 is an equidigital number, since it uses as much as digits as its factorization.

12000001212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891375.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12000001212121 its reverse (12121210000021), we get a palindrome (24121211212142).

The spelling of 12000001212121 in words is "twelve trillion, one million, two hundred twelve thousand, one hundred twenty-one".