20101121333121 has 4 divisors (see below), whose sum is σ = 26801495110832. Its totient is φ = 13400747555412.

The previous prime is 20101121333119. The next prime is 20101121333129. The reversal of 20101121333121 is 12133312110102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20101121333121 - 2¹ = 20101121333119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101121333129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350186888851 + ... + 3350186888856.

It is an arithmetic number, because the mean of its divisors is an integer number (6700373777708).

Almost surely, 2^{20101121333121} is an apocalyptic number.

It is an amenable number.

20101121333121 is a deficient number, since it is larger than the sum of its proper divisors (6700373777711).

20101121333121 is an equidigital number, since it uses as much as digits as its factorization.

20101121333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700373777710.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20101121333121 its reverse (12133312110102), we get a palindrome (32234433443223).

The spelling of 20101121333121 in words is "twenty trillion, one hundred one billion, one hundred twenty-one million, three hundred thirty-three thousand, one hundred twenty-one".