1111020000021 has 12 divisors (see below), whose sum is σ = 1643948293260. Its totient is φ = 722614633920.

The previous prime is 1111019999989. The next prime is 1111020000029. The reversal of 1111020000021 is 1200000201111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15847284996 + 1095172715025 = 125886^2 + 1046505^2 .

It is not a de Polignac number, because 1111020000021 - 2⁵ = 1111019999989 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1111019999958 and 1111020000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111020000029) 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, 1505446786 + ... + 1505447523.

It is an arithmetic number, because the mean of its divisors is an integer number (136995691105).

Almost surely, 2^{1111020000021} is an apocalyptic number.

It is an amenable number.

1111020000021 is a deficient number, since it is larger than the sum of its proper divisors (532928293239).

1111020000021 is a wasteful number, since it uses less digits than its factorization.

1111020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010894356 (or 3010894353 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1111020000021 its reverse (1200000201111), we get a palindrome (2311020201132).

The spelling of 1111020000021 in words is "one trillion, one hundred eleven billion, twenty million, twenty-one", and thus it is an aban number.