1221444131307 has 16 divisors (see below), whose sum is σ = 1653013332000. Its totient is φ = 802153535744.

The previous prime is 1221444131267. The next prime is 1221444131309. The reversal of 1221444131307 is 7031314441221.

It is a cyclic number.

It is not a de Polignac number, because 1221444131307 - 2⁸ = 1221444131051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221444131309) 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, 8431332 + ... + 8574977.

It is an arithmetic number, because the mean of its divisors is an integer number (103313333250).

Almost surely, 2^{1221444131307} is an apocalyptic number.

1221444131307 is a deficient number, since it is larger than the sum of its proper divisors (431569200693).

1221444131307 is a wasteful number, since it uses less digits than its factorization.

1221444131307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17006670.

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 1221444131307 its reverse (7031314441221), we get a palindrome (8252758572528).

The spelling of 1221444131307 in words is "one trillion, two hundred twenty-one billion, four hundred forty-four million, one hundred thirty-one thousand, three hundred seven".