1021201553320 has 64 divisors (see below), whose sum is σ = 2483858805120. Its totient is φ = 375625300224.

The previous prime is 1021201553291. The next prime is 1021201553341. The reversal of 1021201553320 is 233551021201.

It is a super-2 number, since 2×1021201553320² (a number of 25 digits) contains 22 as substring.

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, 3596794 + ... + 3870313.

It is an arithmetic number, because the mean of its divisors is an integer number (38810293830).

Almost surely, 2^{1021201553320} is an apocalyptic number.

1021201553320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021201553320 is an abundant number, since it is smaller than the sum of its proper divisors (1462657251800).

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

1021201553320 is a wasteful number, since it uses less digits than its factorization.

1021201553320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7467394 (or 7467390 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 1021201553320 its reverse (233551021201), we get a palindrome (1254752574521).

The spelling of 1021201553320 in words is "one trillion, twenty-one billion, two hundred one million, five hundred fifty-three thousand, three hundred twenty".