1021111112011 has 8 divisors (see below), whose sum is σ = 1026207799344. Its totient is φ = 1016022588000.

The previous prime is 1021111111987. The next prime is 1021111112023. The reversal of 1021111112011 is 1102111111201.

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 1021111112011 - 2¹³ = 1021111103819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021111111982 and 1021111112000.

It is not an unprimeable number, because it can be changed into a prime (1021111112081) 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, 1789960 + ... + 2290453.

It is an arithmetic number, because the mean of its divisors is an integer number (128275974918).

Almost surely, 2^{1021111112011} is an apocalyptic number.

1021111112011 is a deficient number, since it is larger than the sum of its proper divisors (5096687333).

1021111112011 is an equidigital number, since it uses as much as digits as its factorization.

1021111112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081661.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1021111112011 its reverse (1102111111201), we get a palindrome (2123222223212).

The spelling of 1021111112011 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twelve thousand, eleven".