1101330331021 has 4 divisors (see below), whose sum is σ = 1101556900444. Its totient is φ = 1101103761600.

The previous prime is 1101330331007. The next prime is 1101330331033. The reversal of 1101330331021 is 1201330331011.

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 669878408521 + 431451922500 = 818461^2 + 656850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101330331021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1101330331021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101330331081) 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, 113277420 + ... + 113287141.

It is an arithmetic number, because the mean of its divisors is an integer number (275389225111).

Almost surely, 2^{1101330331021} is an apocalyptic number.

It is an amenable number.

1101330331021 is a deficient number, since it is larger than the sum of its proper divisors (226569423).

1101330331021 is an equidigital number, since it uses as much as digits as its factorization.

1101330331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226569422.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 1101330331021 its reverse (1201330331011), we get a palindrome (2302660662032).

The spelling of 1101330331021 in words is "one trillion, one hundred one billion, three hundred thirty million, three hundred thirty-one thousand, twenty-one".