20102110021121 has 4 divisors (see below), whose sum is σ = 20976114804672. Its totient is φ = 19228105237572.

The previous prime is 20102110021093. The next prime is 20102110021181. The reversal of 20102110021121 is 12112001120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102110021121 - 2¹⁸ = 20102109758977 is a prime.

It is a super-3 number, since 3×20102110021121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102110021096 and 20102110021105.

It is not an unprimeable number, because it can be changed into a prime (20102110021181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437002391741 + ... + 437002391786.

It is an arithmetic number, because the mean of its divisors is an integer number (5244028701168).

Almost surely, 2^{20102110021121} is an apocalyptic number.

It is an amenable number.

20102110021121 is a deficient number, since it is larger than the sum of its proper divisors (874004783551).

20102110021121 is an equidigital number, since it uses as much as digits as its factorization.

20102110021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874004783550.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20102110021121 its reverse (12112001120102), we get a palindrome (32214111141223).

The spelling of 20102110021121 in words is "twenty trillion, one hundred two billion, one hundred ten million, twenty-one thousand, one hundred twenty-one".