1021445667220 has 48 divisors (see below), whose sum is σ = 2356874049600. Its totient is φ = 368762584320.

The previous prime is 1021445667197. The next prime is 1021445667257. The reversal of 1021445667220 is 227665441201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16670625 + ... + 16731784.

It is an arithmetic number, because the mean of its divisors is an integer number (49101542700).

Almost surely, 2^{1021445667220} is an apocalyptic number.

1021445667220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021445667220 is an abundant number, since it is smaller than the sum of its proper divisors (1335428382380).

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

1021445667220 is a wasteful number, since it uses less digits than its factorization.

1021445667220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33402568 (or 33402566 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 1021445667220 in words is "one trillion, twenty-one billion, four hundred forty-five million, six hundred sixty-seven thousand, two hundred twenty".