1110101010021 has 20 divisors (see below), whose sum is σ = 1755846044172. Its totient is φ = 696533966208.

The previous prime is 1110101010019. The next prime is 1110101010119. The reversal of 1110101010021 is 1200101010111.

It can be written as a sum of positive squares in 2 ways, for example, as 962096148225 + 148004861796 = 980865^2 + 384714^2 .

It is not a de Polignac number, because 1110101010021 - 2¹ = 1110101010019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1110101009985 and 1110101010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110101015021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 403085410 + ... + 403088163.

Almost surely, 2^{1110101010021} is an apocalyptic number.

It is an amenable number.

1110101010021 is a deficient number, since it is larger than the sum of its proper divisors (645745034151).

1110101010021 is an equidigital number, since it uses as much as digits as its factorization.

1110101010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806173602 (or 806173593 counting only the distinct ones).

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

Adding to 1110101010021 its reverse (1200101010111), we get a palindrome (2310202020132).

The spelling of 1110101010021 in words is "one trillion, one hundred ten billion, one hundred one million, ten thousand, twenty-one".