1101001012021 has 4 divisors (see below), whose sum is σ = 1165765777452. Its totient is φ = 1036236246592.

The previous prime is 1101001011941. The next prime is 1101001012043. The reversal of 1101001012021 is 1202101001011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 293860483921 + 807140528100 = 542089^2 + 898410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101001012021 - 2⁷ = 1101001011893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101001011989 and 1101001012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101001016021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32382382690 + ... + 32382382723.

It is an arithmetic number, because the mean of its divisors is an integer number (291441444363).

Almost surely, 2^{1101001012021} is an apocalyptic number.

It is an amenable number.

1101001012021 is a deficient number, since it is larger than the sum of its proper divisors (64764765431).

1101001012021 is an equidigital number, since it uses as much as digits as its factorization.

1101001012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64764765430.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1101001012021 its reverse (1202101001011), we get a palindrome (2303102013032).

The spelling of 1101001012021 in words is "one trillion, one hundred one billion, one million, twelve thousand, twenty-one".