1111000011021 has 24 divisors (see below), whose sum is σ = 1606196153016. Its totient is φ = 740012359680.

The previous prime is 1111000011019. The next prime is 1111000011047. The reversal of 1111000011021 is 1201100001111.

It can be written as a sum of positive squares in 4 ways, for example, as 324250524900 + 786749486121 = 569430^2 + 886989^2 .

It is not a de Polignac number, because 1111000011021 - 2¹ = 1111000011019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111000010994 and 1111000011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111000011001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52343191 + ... + 52364411.

It is an arithmetic number, because the mean of its divisors is an integer number (66924839709).

Almost surely, 2^{1111000011021} is an apocalyptic number.

It is an amenable number.

1111000011021 is a deficient number, since it is larger than the sum of its proper divisors (495196141995).

1111000011021 is a wasteful number, since it uses less digits than its factorization.

1111000011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26093 (or 26090 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1111000011021 its reverse (1201100001111), we get a palindrome (2312100012132).

The spelling of 1111000011021 in words is "one trillion, one hundred eleven billion, eleven thousand, twenty-one".