1012197855428 has 24 divisors (see below), whose sum is σ = 1781181830400. Its totient is φ = 503293589280.

The previous prime is 1012197855397. The next prime is 1012197855511. The reversal of 1012197855428 is 8245587912101.

1012197855428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1012197855428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236423 + ... + 1442321.

It is an arithmetic number, because the mean of its divisors is an integer number (74215909600).

Almost surely, 2^{1012197855428} is an apocalyptic number.

It is an amenable number.

1012197855428 is a deficient number, since it is larger than the sum of its proper divisors (768983974972).

1012197855428 is a wasteful number, since it uses less digits than its factorization.

1012197855428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207067 (or 1207065 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 53.

The spelling of 1012197855428 in words is "one trillion, twelve billion, one hundred ninety-seven million, eight hundred fifty-five thousand, four hundred twenty-eight".