1101220121211 has 16 divisors (see below), whose sum is σ = 1678668317184. Its totient is φ = 629036662464.

The previous prime is 1101220121207. The next prime is 1101220121249. The reversal of 1101220121211 is 1121210221011.

It is a happy number.

It is not a de Polignac number, because 1101220121211 - 2² = 1101220121207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101220120211) 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 in 15 ways as a sum of consecutive naturals, for example, 9607431 + ... + 9721376.

It is an arithmetic number, because the mean of its divisors is an integer number (104916769824).

Almost surely, 2^{1101220121211} is an apocalyptic number.

1101220121211 is a deficient number, since it is larger than the sum of its proper divisors (577448195973).

1101220121211 is a wasteful number, since it uses less digits than its factorization.

1101220121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19331530.

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

Adding to 1101220121211 its reverse (1121210221011), we get a palindrome (2222430342222).

The spelling of 1101220121211 in words is "one trillion, one hundred one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred eleven".