1012255312520 has 32 divisors (see below), whose sum is σ = 2320547560920. Its totient is φ = 397262461440.

The previous prime is 1012255312469. The next prime is 1012255312561. The reversal of 1012255312520 is 252135522101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 963110629924 + 49144682596 = 981382^2 + 221686^2 .

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, 238737341 + ... + 238741580.

Almost surely, 2^{1012255312520} is an apocalyptic number.

1012255312520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012255312520 is an abundant number, since it is smaller than the sum of its proper divisors (1308292248400).

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

1012255312520 is a wasteful number, since it uses less digits than its factorization.

1012255312520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477478985 (or 477478981 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 1012255312520 in words is "one trillion, twelve billion, two hundred fifty-five million, three hundred twelve thousand, five hundred twenty".