20101220012121 has 8 divisors (see below), whose sum is σ = 26801649055104. Its totient is φ = 13400802155280.

The previous prime is 20101220012087. The next prime is 20101220012123. The reversal of 20101220012121 is 12121002210102.

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

It is not a de Polignac number, because 20101220012121 - 2¹¹ = 20101220010073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101220012121.

It is not an unprimeable number, because it can be changed into a prime (20101220012123) 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, 3286960 + ... + 7141886.

It is an arithmetic number, because the mean of its divisors is an integer number (3350206131888).

Almost surely, 2^{20101220012121} is an apocalyptic number.

It is an amenable number.

20101220012121 is a deficient number, since it is larger than the sum of its proper divisors (6700429042983).

20101220012121 is a wasteful number, since it uses less digits than its factorization.

20101220012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593071.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20101220012121 its reverse (12121002210102), we get a palindrome (32222222222223).

The spelling of 20101220012121 in words is "twenty trillion, one hundred one billion, two hundred twenty million, twelve thousand, one hundred twenty-one".