10212021111121 has 4 divisors (see below), whose sum is σ = 10277065831732. Its totient is φ = 10146976390512.

The previous prime is 10212021111109. The next prime is 10212021111157. The reversal of 10212021111121 is 12111112021201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 895266054225 + 9316755056896 = 946185^2 + 3052336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212021111121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212021111095 and 10212021111104.

It is not an unprimeable number, because it can be changed into a prime (10212021111191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32522360070 + ... + 32522360383.

It is an arithmetic number, because the mean of its divisors is an integer number (2569266457933).

Almost surely, 2^{10212021111121} is an apocalyptic number.

It is an amenable number.

10212021111121 is a deficient number, since it is larger than the sum of its proper divisors (65044720611).

10212021111121 is an equidigital number, since it uses as much as digits as its factorization.

10212021111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65044720610.

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

Adding to 10212021111121 its reverse (12111112021201), we get a palindrome (22323133132322).

The spelling of 10212021111121 in words is "ten trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".