1221442204245 has 8 divisors (see below), whose sum is σ = 1954307526816. Its totient is φ = 651435842256.

The previous prime is 1221442204223. The next prime is 1221442204247. The reversal of 1221442204245 is 5424022441221.

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

It is not a de Polignac number, because 1221442204245 - 2³⁶ = 1152722727509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221442204247) 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, 40714740127 + ... + 40714740156.

It is an arithmetic number, because the mean of its divisors is an integer number (244288440852).

Almost surely, 2^{1221442204245} is an apocalyptic number.

1221442204245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221442204245 is a deficient number, since it is larger than the sum of its proper divisors (732865322571).

1221442204245 is an equidigital number, since it uses as much as digits as its factorization.

1221442204245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81429480291.

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 1221442204245 its reverse (5424022441221), we get a palindrome (6645464645466).

The spelling of 1221442204245 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, two hundred four thousand, two hundred forty-five".