1212110021201 has 4 divisors (see below), whose sum is σ = 1212112562100. Its totient is φ = 1212107480304.

The previous prime is 1212110021197. The next prime is 1212110021251. The reversal of 1212110021201 is 1021200112121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114904050625 + 1097205970576 = 338975^2 + 1047476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212110021201 - 2² = 1212110021197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212110021251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315746 + ... + 1588683.

It is an arithmetic number, because the mean of its divisors is an integer number (303028140525).

Almost surely, 2^{1212110021201} is an apocalyptic number.

It is an amenable number.

1212110021201 is a deficient number, since it is larger than the sum of its proper divisors (2540899).

1212110021201 is an equidigital number, since it uses as much as digits as its factorization.

1212110021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540898.

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

Adding to 1212110021201 its reverse (1021200112121), we get a palindrome (2233310133322).

The spelling of 1212110021201 in words is "one trillion, two hundred twelve billion, one hundred ten million, twenty-one thousand, two hundred one".