1211312120302 has 4 divisors (see below), whose sum is σ = 1816968180456. Its totient is φ = 605656060150.

The previous prime is 1211312120269. The next prime is 1211312120309. The reversal of 1211312120302 is 2030212131121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1211312120302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211312120309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302828030074 + ... + 302828030077.

It is an arithmetic number, because the mean of its divisors is an integer number (454242045114).

Almost surely, 2^{1211312120302} is an apocalyptic number.

1211312120302 is a deficient number, since it is larger than the sum of its proper divisors (605656060154).

1211312120302 is an equidigital number, since it uses as much as digits as its factorization.

1211312120302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605656060153.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211312120302 its reverse (2030212131121), we get a palindrome (3241524251423).

The spelling of 1211312120302 in words is "one trillion, two hundred eleven billion, three hundred twelve million, one hundred twenty thousand, three hundred two".