20121221201011 has 8 divisors (see below), whose sum is σ = 22995895669344. Its totient is φ = 17246600306880.

The previous prime is 20121221201009. The next prime is 20121221201027. The reversal of 20121221201011 is 11010212212102.

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

It is not a de Polignac number, because 20121221201011 - 2¹ = 20121221201009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121221201051) 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, 12585490 + ... + 14093863.

It is an arithmetic number, because the mean of its divisors is an integer number (2874486958668).

Almost surely, 2^{20121221201011} is an apocalyptic number.

20121221201011 is a deficient number, since it is larger than the sum of its proper divisors (2874674468333).

20121221201011 is a wasteful number, since it uses less digits than its factorization.

20121221201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26787101.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121221201011 its reverse (11010212212102), we get a palindrome (31131433413113).

The spelling of 20121221201011 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, eleven".