1201312433421 has 12 divisors (see below), whose sum is σ = 1757193996480. Its totient is φ = 790737297480.

The previous prime is 1201312433417. The next prime is 1201312433449. The reversal of 1201312433421 is 1243342131021.

1201312433421 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 312 + 4 + 3 + 342 + 1 = 666.

It is not a de Polignac number, because 1201312433421 - 2² = 1201312433417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201312433621) 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, 844804095 + ... + 844805516.

It is an arithmetic number, because the mean of its divisors is an integer number (146432833040).

Almost surely, 2^{1201312433421} is an apocalyptic number.

It is an amenable number.

1201312433421 is a deficient number, since it is larger than the sum of its proper divisors (555881563059).

1201312433421 is a wasteful number, since it uses less digits than its factorization.

1201312433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689609696 (or 1689609693 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1201312433421 its reverse (1243342131021), we get a palindrome (2444654564442).

It can be divided in two parts, 120131 and 2433421, that added together give a palindrome (2553552).

The spelling of 1201312433421 in words is "one trillion, two hundred one billion, three hundred twelve million, four hundred thirty-three thousand, four hundred twenty-one".