1101111002021 has 4 divisors (see below), whose sum is σ = 1165882237452. Its totient is φ = 1036339766592.

The previous prime is 1101111002009. The next prime is 1101111002041. The reversal of 1101111002021 is 1202001111011.

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 757848597025 + 343262404996 = 870545^2 + 585886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101111002021 - 2⁶ = 1101111001957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101111001993 and 1101111002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111002041) 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 3 ways as a sum of consecutive naturals, for example, 32385617690 + ... + 32385617723.

It is an arithmetic number, because the mean of its divisors is an integer number (291470559363).

Almost surely, 2^{1101111002021} is an apocalyptic number.

It is an amenable number.

1101111002021 is a deficient number, since it is larger than the sum of its proper divisors (64771235431).

1101111002021 is an equidigital number, since it uses as much as digits as its factorization.

1101111002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64771235430.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1101111002021 its reverse (1202001111011), we get a palindrome (2303112113032).

The spelling of 1101111002021 in words is "one trillion, one hundred one billion, one hundred eleven million, two thousand, twenty-one".