1212055645400 has 24 divisors (see below), whose sum is σ = 2818029376020. Its totient is φ = 484822258080.

The previous prime is 1212055645399. The next prime is 1212055645433. The reversal of 1212055645400 is 45465502121.

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, 3030138914 + ... + 3030139313.

Almost surely, 2^{1212055645400} is an apocalyptic number.

1212055645400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212055645400 is an abundant number, since it is smaller than the sum of its proper divisors (1605973730620).

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

1212055645400 is a wasteful number, since it uses less digits than its factorization.

1212055645400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060278243 (or 6060278234 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 1212055645400 in words is "one trillion, two hundred twelve billion, fifty-five million, six hundred forty-five thousand, four hundred".