1225412441221 has 8 divisors (see below), whose sum is σ = 1248586899480. Its totient is φ = 1202239963392.

The previous prime is 1225412441173. The next prime is 1225412441263. The reversal of 1225412441221 is 1221442145221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 349859237121 + 875553204100 = 591489^2 + 935710^2 .

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 1225412441221 - 2⁹ = 1225412440709 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 (1225412141221) 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, 785121 + ... + 1751353.

It is an arithmetic number, because the mean of its divisors is an integer number (156073362435).

Almost surely, 2^{1225412441221} is an apocalyptic number.

It is an amenable number.

1225412441221 is a deficient number, since it is larger than the sum of its proper divisors (23174458259).

1225412441221 is an equidigital number, since it uses as much as digits as its factorization.

1225412441221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990215.

The product of its digits is 10240, while the sum is 31.

Adding to 1225412441221 its reverse (1221442145221), we get a palindrome (2446854586442).

The spelling of 1225412441221 in words is "one trillion, two hundred twenty-five billion, four hundred twelve million, four hundred forty-one thousand, two hundred twenty-one".