1101001002021 has 12 divisors (see below), whose sum is σ = 1674036611520. Its totient is φ = 695369053800.

The previous prime is 1101001002019. The next prime is 1101001002029. The reversal of 1101001002021 is 1202001001011.

It is a happy number.

It is not a de Polignac number, because 1101001002021 - 2¹ = 1101001002019 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 = 1101001001994 and 1101001002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101001002029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3219301005 + ... + 3219301346.

It is an arithmetic number, because the mean of its divisors is an integer number (139503050960).

Almost surely, 2^{1101001002021} is an apocalyptic number.

It is an amenable number.

1101001002021 is a deficient number, since it is larger than the sum of its proper divisors (573035609499).

1101001002021 is a wasteful number, since it uses less digits than its factorization.

1101001002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438602376 (or 6438602373 counting only the distinct ones).

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

Adding to 1101001002021 its reverse (1202001001011), we get a palindrome (2303002003032).

The spelling of 1101001002021 in words is "one trillion, one hundred one billion, one million, two thousand, twenty-one".