1332220021 has 4 divisors (see below), whose sum is σ = 1453330944. Its totient is φ = 1211109100.

The previous prime is 1332219971. The next prime is 1332220037. The reversal of 1332220021 is 1200222331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1332220021 - 2⁹ = 1332219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1332219977 and 1332220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1332220051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60555445 + ... + 60555466.

It is an arithmetic number, because the mean of its divisors is an integer number (363332736).

Almost surely, 2^1332220021 is an apocalyptic number.

1332220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1332220021 is a deficient number, since it is larger than the sum of its proper divisors (121110923).

1332220021 is a wasteful number, since it uses less digits than its factorization.

1332220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121110922.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1332220021 is about 36499.5893264568. The cubic root of 1332220021 is about 1100.3359913015.

Adding to 1332220021 its reverse (1200222331), we get a palindrome (2532442352).

The spelling of 1332220021 in words is "one billion, three hundred thirty-two million, two hundred twenty thousand, twenty-one".