1212255124550 has 12 divisors (see below), whose sum is σ = 2254794531756. Its totient is φ = 484902049800.

The previous prime is 1212255124459. The next prime is 1212255124637. The reversal of 1212255124550 is 554215522121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212255124550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12122551196 + ... + 12122551295.

It is an arithmetic number, because the mean of its divisors is an integer number (187899544313).

Almost surely, 2^{1212255124550} is an apocalyptic number.

1212255124550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212255124550 is a deficient number, since it is larger than the sum of its proper divisors (1042539407206).

1212255124550 is a wasteful number, since it uses less digits than its factorization.

1212255124550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24245102503 (or 24245102498 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 1212255124550 in words is "one trillion, two hundred twelve billion, two hundred fifty-five million, one hundred twenty-four thousand, five hundred fifty".