1221431341425 has 24 divisors (see below), whose sum is σ = 2125719108960. Its totient is φ = 617144256000.

The previous prime is 1221431341409. The next prime is 1221431341447. The reversal of 1221431341425 is 5241431341221.

It is not a de Polignac number, because 1221431341425 - 2⁴ = 1221431341409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428570976 + ... + 428573825.

It is an arithmetic number, because the mean of its divisors is an integer number (88571629540).

Almost surely, 2^{1221431341425} is an apocalyptic number.

1221431341425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221431341425 is a deficient number, since it is larger than the sum of its proper divisors (904287767535).

1221431341425 is a wasteful number, since it uses less digits than its factorization.

1221431341425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857144833 (or 857144828 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

Adding to 1221431341425 its reverse (5241431341221), we get a palindrome (6462862682646).

The spelling of 1221431341425 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-one million, three hundred forty-one thousand, four hundred twenty-five".