20121111122001 has 8 divisors (see below), whose sum is σ = 26847001399680. Its totient is φ = 13404647462832.

The previous prime is 20121111121967. The next prime is 20121111122003. The reversal of 20121111122001 is 10022111112102.

It is a happy number.

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

It is not a de Polignac number, because 20121111122001 - 2⁷ = 20121111121873 is a prime.

It is a super-2 number, since 2×20121111122001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121111122003) 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, 2356649646 + ... + 2356658183.

It is an arithmetic number, because the mean of its divisors is an integer number (3355875174960).

Almost surely, 2^{20121111122001} is an apocalyptic number.

It is an amenable number.

20121111122001 is a deficient number, since it is larger than the sum of its proper divisors (6725890277679).

20121111122001 is a wasteful number, since it uses less digits than its factorization.

20121111122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713309255.

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

Adding to 20121111122001 its reverse (10022111112102), we get a palindrome (30143222234103).

The spelling of 20121111122001 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, one".