20100020021121 has 32 divisors (see below), whose sum is σ = 27264553344000. Its totient is φ = 13169944848320.

The previous prime is 20100020021099. The next prime is 20100020021161. The reversal of 20100020021121 is 12112002000102.

It is a cyclic number.

It is not a de Polignac number, because 20100020021121 - 2⁵ = 20100020021089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20100020021097 and 20100020021106.

It is not an unprimeable number, because it can be changed into a prime (20100020021161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39878086 + ... + 40378976.

It is an arithmetic number, because the mean of its divisors is an integer number (852017292000).

Almost surely, 2^{20100020021121} is an apocalyptic number.

It is an amenable number.

20100020021121 is a deficient number, since it is larger than the sum of its proper divisors (7164533322879).

20100020021121 is a wasteful number, since it uses less digits than its factorization.

20100020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501989.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20100020021121 its reverse (12112002000102), we get a palindrome (32212022021223).

The spelling of 20100020021121 in words is "twenty trillion, one hundred billion, twenty million, twenty-one thousand, one hundred twenty-one".