20120121101 has 16 divisors (see below), whose sum is σ = 21073022208. Its totient is φ = 19190169600.

The previous prime is 20120121071. The next prime is 20120121137. The reversal of 20120121101 is 10112102102.

It is a cyclic number.

It is not a de Polignac number, because 20120121101 - 2²² = 20115926797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120121191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1865741 + ... + 1876493.

It is an arithmetic number, because the mean of its divisors is an integer number (1317063888).

Almost surely, 2^20120121101 is an apocalyptic number.

It is an amenable number.

20120121101 is a deficient number, since it is larger than the sum of its proper divisors (952901107).

20120121101 is a wasteful number, since it uses less digits than its factorization.

20120121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11812.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20120121101 its reverse (10112102102), we get a palindrome (30232223203).

The spelling of 20120121101 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, one hundred one".