1021520117120 has 64 divisors (see below), whose sum is σ = 2465781121440. Its totient is φ = 404640952320.

The previous prime is 1021520117021. The next prime is 1021520117131. The reversal of 1021520117120 is 217110251201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 7682261 + ... + 7814100.

Almost surely, 2^{1021520117120} is an apocalyptic number.

1021520117120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021520117120 is an abundant number, since it is smaller than the sum of its proper divisors (1444261004320).

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

1021520117120 is a wasteful number, since it uses less digits than its factorization.

1021520117120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15496483 (or 15496471 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 1021520117120 its reverse (217110251201), we get a palindrome (1238630368321).

The spelling of 1021520117120 in words is "one trillion, twenty-one billion, five hundred twenty million, one hundred seventeen thousand, one hundred twenty".