20410212121 has 32 divisors (see below), whose sum is σ = 24309331200. Its totient is φ = 16944052224.

The previous prime is 20410212089. The next prime is 20410212133. The reversal of 20410212121 is 12121201402.

It is a cyclic number.

It is not a de Polignac number, because 20410212121 - 2⁵ = 20410212089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20410212095 and 20410212104.

It is not an unprimeable number, because it can be changed into a prime (20410212191) 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, 9722730 + ... + 9724828.

It is an arithmetic number, because the mean of its divisors is an integer number (759666600).

Almost surely, 2^20410212121 is an apocalyptic number.

It is an amenable number.

20410212121 is a deficient number, since it is larger than the sum of its proper divisors (3899119079).

20410212121 is a wasteful number, since it uses less digits than its factorization.

20410212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20410212121 its reverse (12121201402), we get a palindrome (32531413523).

The spelling of 20410212121 in words is "twenty billion, four hundred ten million, two hundred twelve thousand, one hundred twenty-one".