1021045851044 has 24 divisors (see below), whose sum is σ = 1835167239360. Its totient is φ = 496713020256.

The previous prime is 1021045851043. The next prime is 1021045851157. The reversal of 1021045851044 is 4401585401201.

It is a junction number, because it is equal to n+sod(n) for n = 1021045850995 and 1021045851013.

It is not an unprimeable number, because it can be changed into a prime (1021045851043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11438417 + ... + 11527335.

It is an arithmetic number, because the mean of its divisors is an integer number (76465301640).

Almost surely, 2^{1021045851044} is an apocalyptic number.

It is an amenable number.

1021045851044 is a deficient number, since it is larger than the sum of its proper divisors (814121388316).

1021045851044 is a wasteful number, since it uses less digits than its factorization.

1021045851044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166547 (or 166545 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The spelling of 1021045851044 in words is "one trillion, twenty-one billion, forty-five million, eight hundred fifty-one thousand, forty-four".