1044555121000 has 32 divisors (see below), whose sum is σ = 2444258985480. Its totient is φ = 417822048000.

The previous prime is 1044555120979. The next prime is 1044555121013. The reversal of 1044555121000 is 1215554401.

It can be written as a sum of positive squares in 4 ways, for example, as 588138677604 + 456416443396 = 766902^2 + 675586^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1044555121000.

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, 522276561 + ... + 522278560.

Almost surely, 2^{1044555121000} is an apocalyptic number.

1044555121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1044555121000 is an abundant number, since it is smaller than the sum of its proper divisors (1399703864480).

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

1044555121000 is a wasteful number, since it uses less digits than its factorization.

1044555121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044555142 (or 1044555128 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 1044555121000 in words is "one trillion, forty-four billion, five hundred fifty-five million, one hundred twenty-one thousand".