1223311201212 has 48 divisors (see below), whose sum is σ = 2946574374912. Its totient is φ = 394602536640.

The previous prime is 1223311201171. The next prime is 1223311201267. The reversal of 1223311201212 is 2121021133221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17830318 + ... + 17898794.

It is an arithmetic number, because the mean of its divisors is an integer number (61386966144).

Almost surely, 2^{1223311201212} is an apocalyptic number.

1223311201212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223311201212 is an abundant number, since it is smaller than the sum of its proper divisors (1723263173700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223311201212 is a wasteful number, since it uses less digits than its factorization.

1223311201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116538 (or 116536 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1223311201212 its reverse (2121021133221), we get a palindrome (3344332334433).

The spelling of 1223311201212 in words is "one trillion, two hundred twenty-three billion, three hundred eleven million, two hundred one thousand, two hundred twelve".