121431221445 has 8 divisors (see below), whose sum is σ = 194289954336. Its totient is φ = 64763318096.

The previous prime is 121431221393. The next prime is 121431221449. The reversal of 121431221445 is 544122134121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121431221445 - 2⁶ = 121431221381 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 (121431221449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4047707367 + ... + 4047707396.

It is an arithmetic number, because the mean of its divisors is an integer number (24286244292).

Almost surely, 2^121431221445 is an apocalyptic number.

121431221445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121431221445 is a deficient number, since it is larger than the sum of its proper divisors (72858732891).

121431221445 is an equidigital number, since it uses as much as digits as its factorization.

121431221445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8095414771.

The product of its digits is 7680, while the sum is 30.

Adding to 121431221445 its reverse (544122134121), we get a palindrome (665553355566).

The spelling of 121431221445 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, four hundred forty-five".