20120012211111 has 16 divisors (see below), whose sum is σ = 26922053064960. Its totient is φ = 13365699557760.

The previous prime is 20120012211097. The next prime is 20120012211119. The reversal of 20120012211111 is 11111221002102.

It is a happy number.

It is not a de Polignac number, because 20120012211111 - 2¹⁷ = 20120012080039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120012211119) 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, 3525810 + ... + 7257503.

It is an arithmetic number, because the mean of its divisors is an integer number (1682628316560).

Almost surely, 2^{20120012211111} is an apocalyptic number.

20120012211111 is a deficient number, since it is larger than the sum of its proper divisors (6802040853849).

20120012211111 is a wasteful number, since it uses less digits than its factorization.

20120012211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785526.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20120012211111 its reverse (11111221002102), we get a palindrome (31231233213213).

The spelling of 20120012211111 in words is "twenty trillion, one hundred twenty billion, twelve million, two hundred eleven thousand, one hundred eleven".