1212112100201 has 8 divisors (see below), whose sum is σ = 1254476595624. Its totient is φ = 1170357166080.

The previous prime is 1212112100189. The next prime is 1212112100239. The reversal of 1212112100201 is 1020012112121.

It can be written as a sum of positive squares in 4 ways, for example, as 24055699801 + 1188056400400 = 155099^2 + 1089980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212112100201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212112100291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152386280 + ... + 152394233.

It is an arithmetic number, because the mean of its divisors is an integer number (156809574453).

Almost surely, 2^{1212112100201} is an apocalyptic number.

It is an amenable number.

1212112100201 is a deficient number, since it is larger than the sum of its proper divisors (42364495423).

1212112100201 is an equidigital number, since it uses as much as digits as its factorization.

1212112100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304780651.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212112100201 its reverse (1020012112121), we get a palindrome (2232124212322).

The spelling of 1212112100201 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred thousand, two hundred one".