1021112120011 has 16 divisors (see below), whose sum is σ = 1077516123840. Its totient is φ = 966237713280.

The previous prime is 1021112120003. The next prime is 1021112120033. The reversal of 1021112120011 is 1100212111201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1021112120011 - 2³ = 1021112120003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021112119973 and 1021112120000.

It is not an unprimeable number, because it can be changed into a prime (1021112120311) 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, 551911 + ... + 1531936.

It is an arithmetic number, because the mean of its divisors is an integer number (67344757740).

Almost surely, 2^{1021112120011} is an apocalyptic number.

1021112120011 is a deficient number, since it is larger than the sum of its proper divisors (56404003829).

1021112120011 is a wasteful number, since it uses less digits than its factorization.

1021112120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084214.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021112120011 its reverse (1100212111201), we get a palindrome (2121324231212).

The spelling of 1021112120011 in words is "one trillion, twenty-one billion, one hundred twelve million, one hundred twenty thousand, eleven".