20011100002121 has 8 divisors (see below), whose sum is σ = 20266948033920. Its totient is φ = 19755603171472.

The previous prime is 20011100002111. The next prime is 20011100002141. The reversal of 20011100002121 is 12120000111002.

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

It is a cyclic number.

It is not a de Polignac number, because 20011100002121 - 2⁶ = 20011100002057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011100002111) 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, 87685601 + ... + 87913518.

It is an arithmetic number, because the mean of its divisors is an integer number (2533368504240).

Almost surely, 2^{20011100002121} is an apocalyptic number.

It is an amenable number.

20011100002121 is a deficient number, since it is larger than the sum of its proper divisors (255848031799).

20011100002121 is a wasteful number, since it uses less digits than its factorization.

20011100002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175600575.

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

Adding to 20011100002121 its reverse (12120000111002), we get a palindrome (32131100113123).

The spelling of 20011100002121 in words is "twenty trillion, eleven billion, one hundred million, two thousand, one hundred twenty-one".