10021121211121 has 4 divisors (see below), whose sum is σ = 10021522610752. Its totient is φ = 10020719811492.

The previous prime is 10021121211119. The next prime is 10021121211133. The reversal of 10021121211121 is 12111212112001.

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 10021121211121 - 2¹ = 10021121211119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021121211095 and 10021121211104.

It is not an unprimeable number, because it can be changed into a prime (10021121211181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200662365 + ... + 200712298.

It is an arithmetic number, because the mean of its divisors is an integer number (2505380652688).

Almost surely, 2^{10021121211121} is an apocalyptic number.

It is an amenable number.

10021121211121 is a deficient number, since it is larger than the sum of its proper divisors (401399631).

10021121211121 is an equidigital number, since it uses as much as digits as its factorization.

10021121211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401399630.

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

Adding to 10021121211121 its reverse (12111212112001), we get a palindrome (22132333323122).

The spelling of 10021121211121 in words is "ten trillion, twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".