20121212211102 has 24 divisors (see below), whose sum is σ = 44774228975736. Its totient is φ = 6525798554736.

The previous prime is 20121212211059. The next prime is 20121212211271. The reversal of 20121212211102 is 20111221212102.

20121212211102 is a `hidden beast` number, since 20 + 121 + 212 + 211 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15106014508 + ... + 15106015839.

It is an arithmetic number, because the mean of its divisors is an integer number (1865592873989).

Almost surely, 2^{20121212211102} is an apocalyptic number.

20121212211102 is an abundant number, since it is smaller than the sum of its proper divisors (24653016764634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121212211102 is a wasteful number, since it uses less digits than its factorization.

20121212211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30212030392 (or 30212030389 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20121212211102 its reverse (20111221212102), we get a palindrome (40232433423204).

The spelling of 20121212211102 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred two".