20112011100121 has 16 divisors (see below), whose sum is σ = 20427568761600. Its totient is φ = 19799136910800.

The previous prime is 20112011100119. The next prime is 20112011100151. The reversal of 20112011100121 is 12100111021102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20112011100121 - 2¹ = 20112011100119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112011100151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22486486 + ... + 23363776.

It is an arithmetic number, because the mean of its divisors is an integer number (1276723047600).

Almost surely, 2^{20112011100121} is an apocalyptic number.

It is an amenable number.

20112011100121 is a deficient number, since it is larger than the sum of its proper divisors (315557661479).

20112011100121 is a wasteful number, since it uses less digits than its factorization.

20112011100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878820.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20112011100121 its reverse (12100111021102), we get a palindrome (32212122121223).

The spelling of 20112011100121 in words is "twenty trillion, one hundred twelve billion, eleven million, one hundred thousand, one hundred twenty-one".