1211013221302 has 4 divisors (see below), whose sum is σ = 1816519831956. Its totient is φ = 605506610650.

The previous prime is 1211013221291. The next prime is 1211013221309. The reversal of 1211013221302 is 2031223101121.

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 1211013221302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211013221309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302753305324 + ... + 302753305327.

It is an arithmetic number, because the mean of its divisors is an integer number (454129957989).

Almost surely, 2^{1211013221302} is an apocalyptic number.

1211013221302 is a deficient number, since it is larger than the sum of its proper divisors (605506610654).

1211013221302 is an equidigital number, since it uses as much as digits as its factorization.

1211013221302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605506610653.

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

Adding to 1211013221302 its reverse (2031223101121), we get a palindrome (3242236322423).

The spelling of 1211013221302 in words is "one trillion, two hundred eleven billion, thirteen million, two hundred twenty-one thousand, three hundred two".