1212210202211 has 4 divisors (see below), whose sum is σ = 1283516684712. Its totient is φ = 1140903719712.

The previous prime is 1212210202207. The next prime is 1212210202219. The reversal of 1212210202211 is 1122020122121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212210202211 - 2² = 1212210202207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 71306482483 = 1212210202211 / (1 + 2 + 1 + 2 + 2 + 1 + 0 + 2 + 0 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212210202211.

It is not an unprimeable number, because it can be changed into a prime (1212210202219) 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, 35653241225 + ... + 35653241258.

It is an arithmetic number, because the mean of its divisors is an integer number (320879171178).

Almost surely, 2^{1212210202211} is an apocalyptic number.

1212210202211 is a deficient number, since it is larger than the sum of its proper divisors (71306482501).

1212210202211 is an equidigital number, since it uses as much as digits as its factorization.

1212210202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71306482500.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212210202211 its reverse (1122020122121), we get a palindrome (2334230324332).

The spelling of 1212210202211 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred two thousand, two hundred eleven".