10021111121021 has 48 divisors (see below), whose sum is σ = 13529961820800. Its totient is φ = 7207397832960.

The previous prime is 10021111120997. The next prime is 10021111121059. The reversal of 10021111121021 is 12012111112001.

It is not a de Polignac number, because 10021111121021 - 2¹⁸ = 10021110858877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021111120987 and 10021111121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021111121521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 212517755 + ... + 212564903.

It is an arithmetic number, because the mean of its divisors is an integer number (281874204600).

Almost surely, 2^{10021111121021} is an apocalyptic number.

10021111121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021111121021 is a deficient number, since it is larger than the sum of its proper divisors (3508850699779).

10021111121021 is a wasteful number, since it uses less digits than its factorization.

10021111121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63526 (or 63513 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10021111121021 its reverse (12012111112001), we get a palindrome (22033222233022).

The spelling of 10021111121021 in words is "ten trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, twenty-one".