212111210012102 has 4 divisors (see below), whose sum is σ = 318166815018156. Its totient is φ = 106055605006050.

The previous prime is 212111210012101. The next prime is 212111210012131. The reversal of 212111210012102 is 201210012111212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111210012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53027802503024 + ... + 53027802503027.

It is an arithmetic number, because the mean of its divisors is an integer number (79541703754539).

Almost surely, 2^{212111210012102} is an apocalyptic number.

212111210012102 is a deficient number, since it is larger than the sum of its proper divisors (106055605006054).

212111210012102 is a wasteful number, since it uses less digits than its factorization.

212111210012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106055605006053.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212111210012102 its reverse (201210012111212), we get a palindrome (413321222123314).

The spelling of 212111210012102 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred ten million, twelve thousand, one hundred two".