20110121001201 has 64 divisors (see below), whose sum is σ = 33734218106880. Its totient is φ = 10351736048640.

The previous prime is 20110121001181. The next prime is 20110121001263. The reversal of 20110121001201 is 10210012101102.

It is not a de Polignac number, because 20110121001201 - 2⁶ = 20110121001137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20110121001301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 104812111 + ... + 105003803.

It is an arithmetic number, because the mean of its divisors is an integer number (527097157920).

Almost surely, 2^{20110121001201} is an apocalyptic number.

20110121001201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20110121001201 is a deficient number, since it is larger than the sum of its proper divisors (13624097105679).

20110121001201 is a wasteful number, since it uses less digits than its factorization.

20110121001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195846.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20110121001201 its reverse (10210012101102), we get a palindrome (30320133102303).

The spelling of 20110121001201 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, one thousand, two hundred one".