20121021001121 has 8 divisors (see below), whose sum is σ = 20211393506304. Its totient is φ = 20030649779520.

The previous prime is 20121021001111. The next prime is 20121021001139. The reversal of 20121021001121 is 12110012012102.

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 20121021001121 - 2²² = 20121016806817 is a prime.

It is a super-2 number, since 2×20121021001121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121021001096 and 20121021001105.

It is not an unprimeable number, because it can be changed into a prime (20121021001111) 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, 46213481 + ... + 46646841.

It is an arithmetic number, because the mean of its divisors is an integer number (2526424188288).

Almost surely, 2^{20121021001121} is an apocalyptic number.

It is an amenable number.

20121021001121 is a deficient number, since it is larger than the sum of its proper divisors (90372505183).

20121021001121 is a wasteful number, since it uses less digits than its factorization.

20121021001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641791.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121021001121 its reverse (12110012012102), we get a palindrome (32231033013223).

The spelling of 20121021001121 in words is "twenty trillion, one hundred twenty-one billion, twenty-one million, one thousand, one hundred twenty-one".