20002111121 has 8 divisors (see below), whose sum is σ = 20985823488. Its totient is φ = 19039554000.

The previous prime is 20002111117. The next prime is 20002111127. The reversal of 20002111121 is 12111120002.

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 20002111121 - 2² = 20002111117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20002111127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5286875 + ... + 5290656.

It is an arithmetic number, because the mean of its divisors is an integer number (2623227936).

Almost surely, 2^20002111121 is an apocalyptic number.

It is an amenable number.

20002111121 is a deficient number, since it is larger than the sum of its proper divisors (983712367).

20002111121 is a wasteful number, since it uses less digits than its factorization.

20002111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10577623.

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

Adding to 20002111121 its reverse (12111120002), we get a palindrome (32113231123).

The spelling of 20002111121 in words is "twenty billion, two million, one hundred eleven thousand, one hundred twenty-one".