1011211122111 has 16 divisors (see below), whose sum is σ = 1427648444928. Its totient is φ = 634460400000.

The previous prime is 1011211122083. The next prime is 1011211122121. The reversal of 1011211122111 is 1112211121101.

It is not a de Polignac number, because 1011211122111 - 2²³ = 1011202733503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211122121) 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, 961146 + ... + 1716456.

It is an arithmetic number, because the mean of its divisors is an integer number (89228027808).

Almost surely, 2^{1011211122111} is an apocalyptic number.

1011211122111 is a deficient number, since it is larger than the sum of its proper divisors (416437322817).

1011211122111 is a wasteful number, since it uses less digits than its factorization.

1011211122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781582.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1011211122111 its reverse (1112211121101), we get a palindrome (2123422243212).

The spelling of 1011211122111 in words is "one trillion, eleven billion, two hundred eleven million, one hundred twenty-two thousand, one hundred eleven".