1021155045452 has 24 divisors (see below), whose sum is σ = 1794809947392. Its totient is φ = 508354355600.

The previous prime is 1021155045403. The next prime is 1021155045479. The reversal of 1021155045452 is 2545405511201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1637177 + ... + 2173167.

It is an arithmetic number, because the mean of its divisors is an integer number (74783747808).

Almost surely, 2^{1021155045452} is an apocalyptic number.

It is an amenable number.

1021155045452 is a deficient number, since it is larger than the sum of its proper divisors (773654901940).

1021155045452 is a wasteful number, since it uses less digits than its factorization.

1021155045452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538069 (or 538067 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 1021155045452 in words is "one trillion, twenty-one billion, one hundred fifty-five million, forty-five thousand, four hundred fifty-two".