12121111020001 has 8 divisors (see below), whose sum is σ = 12764514540800. Its totient is φ = 11478252530160.

The previous prime is 12121111019981. The next prime is 12121111020017. The reversal of 12121111020001 is 10002011112121.

It is a happy number.

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 12121111020001 - 2⁹ = 12121111019489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121111020071) 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, 136212081 + ... + 136301038.

It is an arithmetic number, because the mean of its divisors is an integer number (1595564317600).

Almost surely, 2^{12121111020001} is an apocalyptic number.

It is an amenable number.

12121111020001 is a deficient number, since it is larger than the sum of its proper divisors (643403520799).

12121111020001 is a wasteful number, since it uses less digits than its factorization.

12121111020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272515479.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121111020001 its reverse (10002011112121), we get a palindrome (22123122132122).

The spelling of 12121111020001 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twenty thousand, one".