1220211212311 has 12 divisors (see below), whose sum is σ = 1528616244792. Its totient is φ = 965441837808.

The previous prime is 1220211212299. The next prime is 1220211212419. The reversal of 1220211212311 is 1132121120221.

It is not a de Polignac number, because 1220211212311 - 2⁹ = 1220211211799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211212111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 957778965 + ... + 957780238.

It is an arithmetic number, because the mean of its divisors is an integer number (127384687066).

Almost surely, 2^{1220211212311} is an apocalyptic number.

1220211212311 is a deficient number, since it is larger than the sum of its proper divisors (308405032481).

1220211212311 is a wasteful number, since it uses less digits than its factorization.

1220211212311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915559230 (or 1915559223 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1220211212311 its reverse (1132121120221), we get a palindrome (2352332332532).

The spelling of 1220211212311 in words is "one trillion, two hundred twenty billion, two hundred eleven million, two hundred twelve thousand, three hundred eleven".