20121211102011 has 16 divisors (see below), whose sum is σ = 27168118924800. Its totient is φ = 13244224994208.

The previous prime is 20121211101857. The next prime is 20121211102033. The reversal of 20121211102011 is 11020111212102.

It is a happy number.

It is not a de Polignac number, because 20121211102011 - 2⁹ = 20121211101499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121211102511) 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, 32854545 + ... + 33461373.

It is an arithmetic number, because the mean of its divisors is an integer number (1698007432800).

Almost surely, 2^{20121211102011} is an apocalyptic number.

20121211102011 is a deficient number, since it is larger than the sum of its proper divisors (7046907822789).

20121211102011 is a wasteful number, since it uses less digits than its factorization.

20121211102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746818.

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

Adding to 20121211102011 its reverse (11020111212102), we get a palindrome (31141322314113).

The spelling of 20121211102011 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, one hundred two thousand, eleven".