1011021011111 has 12 divisors (see below), whose sum is σ = 1074395902440. Its totient is φ = 951190604160.

The previous prime is 1011021011107. The next prime is 1011021011129. The reversal of 1011021011111 is 1111101201101.

It is a happy number.

It is not a de Polignac number, because 1011021011111 - 2² = 1011021011107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011021011092 and 1011021011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021011171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110621 + ... + 1426281.

It is an arithmetic number, because the mean of its divisors is an integer number (89532991870).

Almost surely, 2^{1011021011111} is an apocalyptic number.

1011021011111 is a deficient number, since it is larger than the sum of its proper divisors (63374891329).

1011021011111 is a wasteful number, since it uses less digits than its factorization.

1011021011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318354 (or 1318337 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1011021011111 its reverse (1111101201101), we get a palindrome (2122122212212).

The spelling of 1011021011111 in words is "one trillion, eleven billion, twenty-one million, eleven thousand, one hundred eleven".