1212554510400 has 84 divisors (see below), whose sum is σ = 3978189271952. Its totient is φ = 323347868160.

The previous prime is 1212554510353. The next prime is 1212554510443. The reversal of 1212554510400 is 40154552121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126302962 + ... + 126312561.

Almost surely, 2^{1212554510400} is an apocalyptic number.

1212554510400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212554510400 is an abundant number, since it is smaller than the sum of its proper divisors (2765634761552).

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

1212554510400 is a wasteful number, since it uses less digits than its factorization.

1212554510400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252615548 (or 252615533 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1212554510400 in words is "one trillion, two hundred twelve billion, five hundred fifty-four million, five hundred ten thousand, four hundred".