1101011012221 has 4 divisors (see below), whose sum is σ = 1101143720412. Its totient is φ = 1100878304032.

The previous prime is 1101011012219. The next prime is 1101011012263. The reversal of 1101011012221 is 1222101101011.

It is a happy number.

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 760671787225 + 340339224996 = 872165^2 + 583386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101011012221 - 2¹ = 1101011012219 is a prime.

It is a super-2 number, since 2×1101011012221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101011012201) 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, 66341650 + ... + 66358243.

It is an arithmetic number, because the mean of its divisors is an integer number (275285930103).

Almost surely, 2^{1101011012221} is an apocalyptic number.

It is an amenable number.

1101011012221 is a deficient number, since it is larger than the sum of its proper divisors (132708191).

1101011012221 is an equidigital number, since it uses as much as digits as its factorization.

1101011012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132708190.

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

Adding to 1101011012221 its reverse (1222101101011), we get a palindrome (2323112113232).

The spelling of 1101011012221 in words is "one trillion, one hundred one billion, eleven million, twelve thousand, two hundred twenty-one".