1021201011020 has 24 divisors (see below), whose sum is σ = 2144679335568. Its totient is φ = 408450459200.

The previous prime is 1021201010953. The next prime is 1021201011049. The reversal of 1021201011020 is 201101021201.

It is a super-2 number, since 2×1021201011020² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021201010992 and 1021201011010.

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, 1590911 + ... + 2138550.

It is an arithmetic number, because the mean of its divisors is an integer number (89361638982).

Almost surely, 2^{1021201011020} is an apocalyptic number.

1021201011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021201011020 is an abundant number, since it is smaller than the sum of its proper divisors (1123478324548).

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

1021201011020 is a wasteful number, since it uses less digits than its factorization.

1021201011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743161 (or 3743159 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021201011020 its reverse (201101021201), we get a palindrome (1222302032221).

The spelling of 1021201011020 in words is "one trillion, twenty-one billion, two hundred one million, eleven thousand, twenty".