1101010200021 has 12 divisors (see below), whose sum is σ = 1633330447372. Its totient is φ = 714168778176.

The previous prime is 1101010199899. The next prime is 1101010200041. The reversal of 1101010200021 is 1200020101011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 983250728100 + 117759471921 = 991590^2 + 343161^2 .

It is not a de Polignac number, because 1101010200021 - 2¹⁰ = 1101010198997 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 = 1101010199976 and 1101010200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101010200041) 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, 1653168136 + ... + 1653168801.

Almost surely, 2^{1101010200021} is an apocalyptic number.

It is an amenable number.

1101010200021 is a deficient number, since it is larger than the sum of its proper divisors (532320247351).

1101010200021 is a wasteful number, since it uses less digits than its factorization.

1101010200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306336980 (or 3306336977 counting only the distinct ones).

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

Adding to 1101010200021 its reverse (1200020101011), we get a palindrome (2301030301032).

It can be divided in two parts, 1101010 and 200021, that added together give a palindrome (1301031).

The spelling of 1101010200021 in words is "one trillion, one hundred one billion, ten million, two hundred thousand, twenty-one".