1011212111 has 16 divisors (see below), whose sum is σ = 1245350400. Its totient is φ = 799577568.

The previous prime is 1011212093. The next prime is 1011212117. The reversal of 1011212111 is 1112121101.

It is a cyclic number.

It is not a de Polignac number, because 1011212111 - 2⁶ = 1011212047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011212092 and 1011212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212117) 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, 221510 + ... + 226028.

It is an arithmetic number, because the mean of its divisors is an integer number (77834400).

Almost surely, 2^1011212111 is an apocalyptic number.

1011212111 is a deficient number, since it is larger than the sum of its proper divisors (234138289).

1011212111 is a wasteful number, since it uses less digits than its factorization.

1011212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1011212111 is about 31799.5614906873. The cubic root of 1011212111 is about 1003.7234887569.

Adding to 1011212111 its reverse (1112121101), we get a palindrome (2123333212).

The spelling of 1011212111 in words is "one billion, eleven million, two hundred twelve thousand, one hundred eleven".