1011110010021 has 12 divisors (see below), whose sum is σ = 1546403544972. Its totient is φ = 634421966976.

The previous prime is 1011110010019. The next prime is 1011110010049. The reversal of 1011110010021 is 1200100111101.

It can be written as a sum of positive squares in 2 ways, for example, as 634230660996 + 376879349025 = 796386^2 + 613905^2 .

It is not a de Polignac number, because 1011110010021 - 2¹ = 1011110010019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011110009985 and 1011110010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011110012021) 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 11 ways as a sum of consecutive naturals, for example, 3304280926 + ... + 3304281231.

It is an arithmetic number, because the mean of its divisors is an integer number (128866962081).

Almost surely, 2^{1011110010021} is an apocalyptic number.

It is an amenable number.

1011110010021 is a deficient number, since it is larger than the sum of its proper divisors (535293534951).

1011110010021 is a wasteful number, since it uses less digits than its factorization.

1011110010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608562180 (or 6608562177 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1011110010021 its reverse (1200100111101), we get a palindrome (2211210121122).

The spelling of 1011110010021 in words is "one trillion, eleven billion, one hundred ten million, ten thousand, twenty-one".