1000021011111 has 36 divisors (see below), whose sum is σ = 1483916152888. Its totient is φ = 648815108832.

The previous prime is 1000021011107. The next prime is 1000021011113. The reversal of 1000021011111 is 1111101200001.

It is not a de Polignac number, because 1000021011111 - 2² = 1000021011107 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000021011093 and 1000021011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4033701 + ... + 4274433.

Almost surely, 2^{1000021011111} is an apocalyptic number.

1000021011111 is a deficient number, since it is larger than the sum of its proper divisors (483895141777).

1000021011111 is an equidigital number, since it uses as much as digits as its factorization.

1000021011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240972 (or 240886 counting only the distinct ones).

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

Adding to 1000021011111 its reverse (1111101200001), we get a palindrome (2111122211112).

The spelling of 1000021011111 in words is "one trillion, twenty-one million, eleven thousand, one hundred eleven".