1221132230312 has 8 divisors (see below), whose sum is σ = 2289622931850. Its totient is φ = 610566115152.

The previous prime is 1221132230291. The next prime is 1221132230369. The reversal of 1221132230312 is 2130322311221.

It can be written as a sum of positive squares in only one way, i.e., 944344707076 + 276787523236 = 971774^2 + 526106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76320764387 + ... + 76320764402.

Almost surely, 2^{1221132230312} is an apocalyptic number.

It is an amenable number.

1221132230312 is a deficient number, since it is larger than the sum of its proper divisors (1068490701538).

1221132230312 is a wasteful number, since it uses less digits than its factorization.

1221132230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152641528795 (or 152641528791 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1221132230312 its reverse (2130322311221), we get a palindrome (3351454541533).

The spelling of 1221132230312 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty thousand, three hundred twelve".