20121211122102 has 12 divisors (see below), whose sum is σ = 43595957431260. Its totient is φ = 6707070374028.

The previous prime is 20121211121983. The next prime is 20121211122113. The reversal of 20121211122102 is 20122111212102.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1117845062339 = 20121211122102 / (2 + 0 + 1 + 2 + 1 + 2 + 1 + 1 + 1 + 2 + 2 + 1 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558922531152 + ... + 558922531187.

It is an arithmetic number, because the mean of its divisors is an integer number (3632996452605).

Almost surely, 2^{20121211122102} is an apocalyptic number.

20121211122102 is an abundant number, since it is smaller than the sum of its proper divisors (23474746309158).

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

20121211122102 is a wasteful number, since it uses less digits than its factorization.

20121211122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117845062347 (or 1117845062344 counting only the distinct ones).

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

Adding to 20121211122102 its reverse (20122111212102), we get a palindrome (40243322334204).

The spelling of 20121211122102 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred two".