10021531401220 has 24 divisors (see below), whose sum is σ = 21390219485208. Its totient is φ = 3942897600000.

The previous prime is 10021531401209. The next prime is 10021531401241. The reversal of 10021531401220 is 2210413512001.

It can be written as a sum of positive squares in 4 ways, for example, as 151993938496 + 9869537462724 = 389864^2 + 3141582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10021531401191 and 10021531401200.

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, 4107183781 + ... + 4107186220.

It is an arithmetic number, because the mean of its divisors is an integer number (891259145217).

Almost surely, 2^{10021531401220} is an apocalyptic number.

10021531401220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021531401220 is an abundant number, since it is smaller than the sum of its proper divisors (11368688083988).

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

10021531401220 is a wasteful number, since it uses less digits than its factorization.

10021531401220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214370071 (or 8214370069 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 10021531401220 its reverse (2210413512001), we get a palindrome (12231944913221).

The spelling of 10021531401220 in words is "ten trillion, twenty-one billion, five hundred thirty-one million, four hundred one thousand, two hundred twenty".