20110121371 has 2 divisors, whose sum is σ = 20110121372. Its totient is φ = 20110121370.

The previous prime is 20110121333. The next prime is 20110121393. The reversal of 20110121371 is 17312101102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110121371 - 2²¹ = 20108024219 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110121671) 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 as a sum of consecutive naturals, namely, 10055060685 + 10055060686.

It is an arithmetic number, because the mean of its divisors is an integer number (10055060686).

Almost surely, 2^20110121371 is an apocalyptic number.

20110121371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110121371 is an equidigital number, since it uses as much as digits as its factorization.

20110121371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 20110121371 its reverse (17312101102), we get a palindrome (37422222473).

The spelling of 20110121371 in words is "twenty billion, one hundred ten million, one hundred twenty-one thousand, three hundred seventy-one".