20121111031336 has 64 divisors (see below), whose sum is σ = 43807837409280. Its totient is φ = 8486166571200.

The previous prime is 20121111031331. The next prime is 20121111031337. The reversal of 20121111031336 is 63313011112102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121111031336.

It is not an unprimeable number, because it can be changed into a prime (20121111031331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10214400 + ... + 12023983.

It is an arithmetic number, because the mean of its divisors is an integer number (684497459520).

Almost surely, 2^{20121111031336} is an apocalyptic number.

It is an amenable number.

20121111031336 is an abundant number, since it is smaller than the sum of its proper divisors (23686726377944).

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

20121111031336 is a wasteful number, since it uses less digits than its factorization.

20121111031336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22238654 (or 22238650 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 20121111031336 its reverse (63313011112102), we get a palindrome (83434122143438).

The spelling of 20121111031336 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, thirty-one thousand, three hundred thirty-six".