1101111313021 has 2 divisors, whose sum is σ = 1101111313022. Its totient is φ = 1101111313020.

The previous prime is 1101111313007. The next prime is 1101111313031. The reversal of 1101111313021 is 1203131111011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678597012900 + 422514300121 = 823770^2 + 650011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101111313021 - 2⁵ = 1101111312989 is a prime.

It is a super-2 number, since 2×1101111313021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101111312986 and 1101111313004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101111313031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555656510 + 550555656511.

It is an arithmetic number, because the mean of its divisors is an integer number (550555656511).

Almost surely, 2^{1101111313021} is an apocalyptic number.

It is an amenable number.

1101111313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111313021 is an equidigital number, since it uses as much as digits as its factorization.

1101111313021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1101111313021 its reverse (1203131111011), we get a palindrome (2304242424032).

The spelling of 1101111313021 in words is "one trillion, one hundred one billion, one hundred eleven million, three hundred thirteen thousand, twenty-one".