1221033425215 has 8 divisors (see below), whose sum is σ = 1465256564928. Its totient is φ = 976815770400.

The previous prime is 1221033425203. The next prime is 1221033425219. The reversal of 1221033425215 is 5125243301221.

It is a happy number.

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

It is not a de Polignac number, because 1221033425215 - 2¹¹ = 1221033423167 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 (1221033425219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864436 + ... + 1785865.

It is an arithmetic number, because the mean of its divisors is an integer number (183157070616).

Almost surely, 2^{1221033425215} is an apocalyptic number.

1221033425215 is a deficient number, since it is larger than the sum of its proper divisors (244223139713).

1221033425215 is an equidigital number, since it uses as much as digits as its factorization.

1221033425215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742449.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1221033425215 its reverse (5125243301221), we get a palindrome (6346276726436).

The spelling of 1221033425215 in words is "one trillion, two hundred twenty-one billion, thirty-three million, four hundred twenty-five thousand, two hundred fifteen".