1011222121111 has 16 divisors (see below), whose sum is σ = 1075994268768. Its totient is φ = 947039385600.

The previous prime is 1011222121037. The next prime is 1011222121159. The reversal of 1011222121111 is 1111212221101.

1011222121111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1011222121111 - 2⁷ = 1011222120983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011222124111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19993791 + ... + 20044303.

It is an arithmetic number, because the mean of its divisors is an integer number (67249641798).

Almost surely, 2^{1011222121111} is an apocalyptic number.

1011222121111 is a deficient number, since it is larger than the sum of its proper divisors (64772147657).

1011222121111 is a wasteful number, since it uses less digits than its factorization.

1011222121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56322.

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

Adding to 1011222121111 its reverse (1111212221101), we get a palindrome (2122434342212).

The spelling of 1011222121111 in words is "one trillion, eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".