1100012010021 has 12 divisors (see below), whose sum is σ = 1588928979820. Its totient is φ = 733330843200.

The previous prime is 1100012010011. The next prime is 1100012010049. The reversal of 1100012010021 is 1200102100011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 923011740225 + 177000269796 = 960735^2 + 420714^2 .

It is not a de Polignac number, because 1100012010021 - 2¹⁷ = 1100011878949 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100012009985 and 1100012010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100012010011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182176 + ... + 1494393.

Almost surely, 2^{1100012010021} is an apocalyptic number.

It is an amenable number.

1100012010021 is a deficient number, since it is larger than the sum of its proper divisors (488916969799).

1100012010021 is a wasteful number, since it uses less digits than its factorization.

1100012010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749476 (or 1749473 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1100012010021 its reverse (1200102100011), we get a palindrome (2300114110032).

The spelling of 1100012010021 in words is "one trillion, one hundred billion, twelve million, ten thousand, twenty-one".