1225412221452 has 12 divisors (see below), whose sum is σ = 2859295183416. Its totient is φ = 408470740480.

The previous prime is 1225412221421. The next prime is 1225412221459. The reversal of 1225412221452 is 2541222145221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1225412221452² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225412221459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51058842549 + ... + 51058842572.

It is an arithmetic number, because the mean of its divisors is an integer number (238274598618).

Almost surely, 2^{1225412221452} is an apocalyptic number.

1225412221452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225412221452 is an abundant number, since it is smaller than the sum of its proper divisors (1633882961964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225412221452 is a wasteful number, since it uses less digits than its factorization.

1225412221452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102117685128 (or 102117685126 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

Adding to 1225412221452 its reverse (2541222145221), we get a palindrome (3766634366673).

The spelling of 1225412221452 in words is "one trillion, two hundred twenty-five billion, four hundred twelve million, two hundred twenty-one thousand, four hundred fifty-two".