20112000121021 has 16 divisors (see below), whose sum is σ = 21663539867200. Its totient is φ = 18609789356928.

The previous prime is 20112000121013. The next prime is 20112000121049. The reversal of 20112000121021 is 12012100021102.

It is a cyclic number.

It is not a de Polignac number, because 20112000121021 - 2³ = 20112000121013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112000120992 and 20112000121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112000121051) 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, 27026095 + ... + 27760291.

It is an arithmetic number, because the mean of its divisors is an integer number (1353971241700).

Almost surely, 2^{20112000121021} is an apocalyptic number.

It is an amenable number.

20112000121021 is a deficient number, since it is larger than the sum of its proper divisors (1551539746179).

20112000121021 is a wasteful number, since it uses less digits than its factorization.

20112000121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767788.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20112000121021 its reverse (12012100021102), we get a palindrome (32124100142123).

The spelling of 20112000121021 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one thousand, twenty-one".