1225221551412 has 24 divisors (see below), whose sum is σ = 2951071264512. Its totient is φ = 395232758400.

The previous prime is 1225221551401. The next prime is 1225221551423. The reversal of 1225221551412 is 2141551225221.

It is an interprime number because it is at equal distance from previous prime (1225221551401) and next prime (1225221551423).

It is a congruent number.

It is an unprimeable number.

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, 1646802789 + ... + 1646803532.

It is an arithmetic number, because the mean of its divisors is an integer number (122961302688).

Almost surely, 2^{1225221551412} is an apocalyptic number.

1225221551412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225221551412 is an abundant number, since it is smaller than the sum of its proper divisors (1725849713100).

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

1225221551412 is a wasteful number, since it uses less digits than its factorization.

1225221551412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293606359 (or 3293606357 counting only the distinct ones).

The product of its digits is 16000, while the sum is 33.

Adding to 1225221551412 its reverse (2141551225221), we get a palindrome (3366772776633).

The spelling of 1225221551412 in words is "one trillion, two hundred twenty-five billion, two hundred twenty-one million, five hundred fifty-one thousand, four hundred twelve".