1101221122011 has 4 divisors (see below), whose sum is σ = 1468294829352. Its totient is φ = 734147414672.

The previous prime is 1101221121997. The next prime is 1101221122021. The reversal of 1101221122011 is 1102211221011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101221122011 - 2²¹ = 1101219024859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101221122021) 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, 183536853666 + ... + 183536853671.

It is an arithmetic number, because the mean of its divisors is an integer number (367073707338).

Almost surely, 2^{1101221122011} is an apocalyptic number.

1101221122011 is a deficient number, since it is larger than the sum of its proper divisors (367073707341).

1101221122011 is an equidigital number, since it uses as much as digits as its factorization.

1101221122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367073707340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1101221122011 its reverse (1102211221011), we get a palindrome (2203432343022).

The spelling of 1101221122011 in words is "one trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, eleven".