1101111022021 has 8 divisors (see below), whose sum is σ = 1119370340088. Its totient is φ = 1082858424000.

The previous prime is 1101111022001. The next prime is 1101111022051. The reversal of 1101111022021 is 1202201111011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 137207272225 + 963903749796 = 370415^2 + 981786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1101111022021 - 2²¹ = 1101108924869 is a prime.

It is a super-2 number, since 2×1101111022021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101111021992 and 1101111022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111022001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349050 + ... + 2005531.

It is an arithmetic number, because the mean of its divisors is an integer number (139921292511).

Almost surely, 2^{1101111022021} is an apocalyptic number.

It is an amenable number.

1101111022021 is a deficient number, since it is larger than the sum of its proper divisors (18259318067).

1101111022021 is an equidigital number, since it uses as much as digits as its factorization.

1101111022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360023.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1101111022021 its reverse (1202201111011), we get a palindrome (2303312133032).

The spelling of 1101111022021 in words is "one trillion, one hundred one billion, one hundred eleven million, twenty-two thousand, twenty-one".