20121111201110 has 64 divisors (see below), whose sum is σ = 38666785190400. Its totient is φ = 7516358438400.

The previous prime is 20121111201031. The next prime is 20121111201119. The reversal of 20121111201110 is 1110211112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111201119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95957561 + ... + 96167019.

It is an arithmetic number, because the mean of its divisors is an integer number (604168518600).

Almost surely, 2^{20121111201110} is an apocalyptic number.

20121111201110 is a deficient number, since it is larger than the sum of its proper divisors (18545673989290).

20121111201110 is a wasteful number, since it uses less digits than its factorization.

20121111201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216677.

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

Adding to 20121111201110 its reverse (1110211112102), we get a palindrome (21231322313212).

The spelling of 20121111201110 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, two hundred one thousand, one hundred ten".