20002121121121 has 8 divisors (see below), whose sum is σ = 20107831845888. Its totient is φ = 19896420684000.

The previous prime is 20002121121097. The next prime is 20002121121133. The reversal of 20002121121121 is 12112112120002.

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 20002121121121 - 2⁹ = 20002121120609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002121121095 and 20002121121104.

It is not an unprimeable number, because it can be changed into a prime (20002121121221) 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, 1342636 + ... + 6465826.

It is an arithmetic number, because the mean of its divisors is an integer number (2513478980736).

Almost surely, 2^{20002121121121} is an apocalyptic number.

It is an amenable number.

20002121121121 is a deficient number, since it is larger than the sum of its proper divisors (105710724767).

20002121121121 is a wasteful number, since it uses less digits than its factorization.

20002121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143823.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20002121121121 its reverse (12112112120002), we get a palindrome (32114233241123).

It can be divided in two parts, 20002 and 121121121, that multiplied together give a palindrome (2422664662242).

The spelling of 20002121121121 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".