20011000021111 has 8 divisors (see below), whose sum is σ = 21838472864784. Its totient is φ = 18184909014720.

The previous prime is 20011000021081. The next prime is 20011000021121. The reversal of 20011000021111 is 11112000011002.

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 20011000021111 - 2⁷ = 20011000020983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011000021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345429036 + ... + 345486961.

It is an arithmetic number, because the mean of its divisors is an integer number (2729809108098).

Almost surely, 2^{20011000021111} is an apocalyptic number.

20011000021111 is a deficient number, since it is larger than the sum of its proper divisors (1827472843673).

20011000021111 is a wasteful number, since it uses less digits than its factorization.

20011000021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690918641.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011000021111 its reverse (11112000011002), we get a palindrome (31123000032113).

The spelling of 20011000021111 in words is "twenty trillion, eleven billion, twenty-one thousand, one hundred eleven".