1011222121011 has 16 divisors (see below), whose sum is σ = 1386278089728. Its totient is φ = 655278465600.

The previous prime is 1011222120991. The next prime is 1011222121037. The reversal of 1011222121011 is 1101212221101.

It is a happy number.

It is not a de Polignac number, because 1011222121011 - 2⁶ = 1011222120947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011222123011) 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, 15135151 + ... + 15201816.

It is an arithmetic number, because the mean of its divisors is an integer number (86642380608).

Almost surely, 2^{1011222121011} is an apocalyptic number.

1011222121011 is a deficient number, since it is larger than the sum of its proper divisors (375055968717).

1011222121011 is a wasteful number, since it uses less digits than its factorization.

1011222121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30337282.

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

Adding to 1011222121011 its reverse (1101212221101), we get a palindrome (2112434342112).

The spelling of 1011222121011 in words is "one trillion, eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".