1021210413220 has 24 divisors (see below), whose sum is σ = 2218491588600. Its totient is φ = 394398504192.

The previous prime is 1021210413203. The next prime is 1021210413257. The reversal of 1021210413220 is 223140121201.

It can be written as a sum of positive squares in 4 ways, for example, as 257795136 + 1020952618084 = 16056^2 + 1010422^2 .

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, 880353225 + ... + 880354384.

It is an arithmetic number, because the mean of its divisors is an integer number (92437149525).

Almost surely, 2^{1021210413220} is an apocalyptic number.

1021210413220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021210413220 is an abundant number, since it is smaller than the sum of its proper divisors (1197281175380).

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

1021210413220 is a wasteful number, since it uses less digits than its factorization.

1021210413220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760707647 (or 1760707645 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1021210413220 its reverse (223140121201), we get a palindrome (1244350534421).

The spelling of 1021210413220 in words is "one trillion, twenty-one billion, two hundred ten million, four hundred thirteen thousand, two hundred twenty".