1021202011220 has 48 divisors (see below), whose sum is σ = 2171314122768. Its totient is φ = 403404072960.

The previous prime is 1021202011211. The next prime is 1021202011261. The reversal of 1021202011220 is 221102021201.

It can be written as a sum of positive squares in 8 ways, for example, as 556211673616 + 464990337604 = 745796^2 + 681902^2 .

It is a super-3 number, since 3×1021202011220³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021202011195 and 1021202011204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189611 + ... + 1441650.

It is an arithmetic number, because the mean of its divisors is an integer number (45235710891).

Almost surely, 2^{1021202011220} is an apocalyptic number.

1021202011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021202011220 is an abundant number, since it is smaller than the sum of its proper divisors (1150112111548).

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

1021202011220 is a wasteful number, since it uses less digits than its factorization.

1021202011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631660 (or 1631658 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021202011220 its reverse (221102021201), we get a palindrome (1242304032421).

The spelling of 1021202011220 in words is "one trillion, twenty-one billion, two hundred two million, eleven thousand, two hundred twenty".