10021121021011 has 4 divisors (see below), whose sum is σ = 10456821934992. Its totient is φ = 9585420107032.

The previous prime is 10021121020997. The next prime is 10021121021017. The reversal of 10021121021011 is 11012012112001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10021121021011 - 2⁵ = 10021121020979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021121020982 and 10021121021000.

It is not an unprimeable number, because it can be changed into a prime (10021121021017) 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, 217850456956 + ... + 217850457001.

It is an arithmetic number, because the mean of its divisors is an integer number (2614205483748).

Almost surely, 2^{10021121021011} is an apocalyptic number.

10021121021011 is a deficient number, since it is larger than the sum of its proper divisors (435700913981).

10021121021011 is an equidigital number, since it uses as much as digits as its factorization.

10021121021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435700913980.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10021121021011 its reverse (11012012112001), we get a palindrome (21033133133012).

The spelling of 10021121021011 in words is "ten trillion, twenty-one billion, one hundred twenty-one million, twenty-one thousand, eleven".