201212102105 has 16 divisors (see below), whose sum is σ = 275965971840. Its totient is φ = 137965039872.

The previous prime is 201212102053. The next prime is 201212102173. The reversal of 201212102105 is 501201212102.

It is a cyclic number.

It is not a de Polignac number, because 201212102105 - 2¹⁴ = 201212085721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383441 + ... + 741249.

It is an arithmetic number, because the mean of its divisors is an integer number (17247873240).

Almost surely, 2^201212102105 is an apocalyptic number.

It is an amenable number.

201212102105 is a deficient number, since it is larger than the sum of its proper divisors (74753869735).

201212102105 is a wasteful number, since it uses less digits than its factorization.

201212102105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373888.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 201212102105 its reverse (501201212102), we get a palindrome (702413314207).

The spelling of 201212102105 in words is "two hundred one billion, two hundred twelve million, one hundred two thousand, one hundred five".