1021111130021 has 8 divisors (see below), whose sum is σ = 1021417164024. Its totient is φ = 1020805156800.

The previous prime is 1021111129991. The next prime is 1021111130029. The reversal of 1021111130021 is 1200311111201.

It can be written as a sum of positive squares in 4 ways, for example, as 419695369921 + 601415760100 = 647839^2 + 775510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021111130021 - 2³⁴ = 1003931260837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021111129978 and 1021111130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021111130029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88043795 + ... + 88055391.

It is an arithmetic number, because the mean of its divisors is an integer number (127677145503).

Almost surely, 2^{1021111130021} is an apocalyptic number.

It is an amenable number.

1021111130021 is a deficient number, since it is larger than the sum of its proper divisors (306034003).

1021111130021 is an equidigital number, since it uses as much as digits as its factorization.

1021111130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30391.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1021111130021 its reverse (1200311111201), we get a palindrome (2221422241222).

The spelling of 1021111130021 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred thirty thousand, twenty-one".