1021011111111 has 8 divisors (see below), whose sum is σ = 1387033962480. Its totient is φ = 667831166912.

The previous prime is 1021011111047. The next prime is 1021011111137. The reversal of 1021011111111 is 1111111101201.

1021011111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021011111111 - 2⁶ = 1021011111047 is a prime.

1021011111111 is a modest number, since divided by 1111111 gives 102101 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021011111181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3210726606 + ... + 3210726923.

It is an arithmetic number, because the mean of its divisors is an integer number (173379245310).

Almost surely, 2^{1021011111111} is an apocalyptic number.

1021011111111 is a deficient number, since it is larger than the sum of its proper divisors (366022851369).

1021011111111 is an equidigital number, since it uses as much as digits as its factorization.

1021011111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421453585.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 1021011111111 its reverse (1111111101201), we get a palindrome (2132122212312).

The spelling of 1021011111111 in words is "one trillion, twenty-one billion, eleven million, one hundred eleven thousand, one hundred eleven".