12102020121111 has 32 divisors (see below), whose sum is σ = 16728431385600. Its totient is φ = 7773014632320.

The previous prime is 12102020121049. The next prime is 12102020121179. The reversal of 12102020121111 is 11112102020121.

It is a happy number.

It is not a de Polignac number, because 12102020121111 - 2⁹ = 12102020120599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102020121511) 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, 667614930 + ... + 667633056.

It is an arithmetic number, because the mean of its divisors is an integer number (522763480800).

Almost surely, 2^{12102020121111} is an apocalyptic number.

12102020121111 is a deficient number, since it is larger than the sum of its proper divisors (4626411264489).

12102020121111 is a wasteful number, since it uses less digits than its factorization.

12102020121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34279.

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

Adding to 12102020121111 its reverse (11112102020121), we get a palindrome (23214122141232).

It can be divided in two parts, 12102020121 and 111, that multiplied together give a palindrome (1343324233431).

The spelling of 12102020121111 in words is "twelve trillion, one hundred two billion, twenty million, one hundred twenty-one thousand, one hundred eleven".