20110021121111 has 16 divisors (see below), whose sum is σ = 21379362588000. Its totient is φ = 18861795072000.

The previous prime is 20110021121083. The next prime is 20110021121123. The reversal of 20110021121111 is 11112112001102.

It is a cyclic number.

It is not a de Polignac number, because 20110021121111 - 2³⁸ = 19835143214167 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 (20110021121611) 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, 31309115 + ... + 31944963.

It is an arithmetic number, because the mean of its divisors is an integer number (1336210161750).

Almost surely, 2^{20110021121111} is an apocalyptic number.

20110021121111 is a deficient number, since it is larger than the sum of its proper divisors (1269341466889).

20110021121111 is a wasteful number, since it uses less digits than its factorization.

20110021121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652450.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20110021121111 its reverse (11112112001102), we get a palindrome (31222133122213).

The spelling of 20110021121111 in words is "twenty trillion, one hundred ten billion, twenty-one million, one hundred twenty-one thousand, one hundred eleven".