4021221320132 has 24 divisors (see below), whose sum is σ = 7451169990264. Its totient is φ = 1892318257152.

The previous prime is 4021221320131. The next prime is 4021221320161. The reversal of 4021221320132 is 2310231221204.

It can be written as a sum of positive squares in 4 ways, for example, as 1947436996036 + 2073784324096 = 1395506^2 + 1440064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4021221320098 and 4021221320107.

It is not an unprimeable number, because it can be changed into a prime (4021221320131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6958508 + ... + 7514204.

It is an arithmetic number, because the mean of its divisors is an integer number (310465416261).

Almost surely, 2^{4021221320132} is an apocalyptic number.

It is an amenable number.

4021221320132 is a deficient number, since it is larger than the sum of its proper divisors (3429948670132).

4021221320132 is a wasteful number, since it uses less digits than its factorization.

4021221320132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662135 (or 662133 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 4021221320132 its reverse (2310231221204), we get a palindrome (6331452541336).

The spelling of 4021221320132 in words is "four trillion, twenty-one billion, two hundred twenty-one million, three hundred twenty thousand, one hundred thirty-two".