20011101122121 has 8 divisors (see below), whose sum is σ = 26807920619424. Its totient is φ = 13277507853120.

The previous prime is 20011101122119. The next prime is 20011101122183. The reversal of 20011101122121 is 12122110111002.

It is a happy number.

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

It is not a de Polignac number, because 20011101122121 - 2¹ = 20011101122119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011101122121.

It is not an unprimeable number, because it can be changed into a prime (20011101122521) 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, 15806556336 + ... + 15806557601.

It is an arithmetic number, because the mean of its divisors is an integer number (3350990077428).

Almost surely, 2^{20011101122121} is an apocalyptic number.

It is an amenable number.

20011101122121 is a deficient number, since it is larger than the sum of its proper divisors (6796819497303).

20011101122121 is a wasteful number, since it uses less digits than its factorization.

20011101122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31613114151.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20011101122121 its reverse (12122110111002), we get a palindrome (32133211233123).

The spelling of 20011101122121 in words is "twenty trillion, eleven billion, one hundred one million, one hundred twenty-two thousand, one hundred twenty-one".