1221231313301 has 16 divisors (see below), whose sum is σ = 1302194995200. Its totient is φ = 1141945831728.

The previous prime is 1221231313273. The next prime is 1221231313333. The reversal of 1221231313301 is 1033131321221.

It is a cyclic number.

It is not a de Polignac number, because 1221231313301 - 2²⁶ = 1221164204437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221231313391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4625216 + ... + 4882118.

It is an arithmetic number, because the mean of its divisors is an integer number (81387187200).

Almost surely, 2^{1221231313301} is an apocalyptic number.

It is an amenable number.

1221231313301 is a deficient number, since it is larger than the sum of its proper divisors (80963681899).

1221231313301 is a wasteful number, since it uses less digits than its factorization.

1221231313301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260168.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1221231313301 its reverse (1033131321221), we get a palindrome (2254362634522).

The spelling of 1221231313301 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred one".