10121111001021 has 4 divisors (see below), whose sum is σ = 13494814668032. Its totient is φ = 6747407334012.

The previous prime is 10121111001017. The next prime is 10121111001031. The reversal of 10121111001021 is 12010011112101.

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 not a de Polignac number, because 10121111001021 - 2² = 10121111001017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121111000988 and 10121111001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121111001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686851833501 + ... + 1686851833506.

It is an arithmetic number, because the mean of its divisors is an integer number (3373703667008).

Almost surely, 2^{10121111001021} is an apocalyptic number.

It is an amenable number.

10121111001021 is a deficient number, since it is larger than the sum of its proper divisors (3373703667011).

10121111001021 is an equidigital number, since it uses as much as digits as its factorization.

10121111001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373703667010.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 10121111001021 its reverse (12010011112101), we get a palindrome (22131122113122).

The spelling of 10121111001021 in words is "ten trillion, one hundred twenty-one billion, one hundred eleven million, one thousand, twenty-one".