1331222402 has 4 divisors (see below), whose sum is σ = 1996833606. Its totient is φ = 665611200.

The previous prime is 1331222401. The next prime is 1331222437. The reversal of 1331222402 is 2042221331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 926045761 + 405176641 = 30431^2 + 20129^2 .

It is not an unprimeable number, because it can be changed into a prime (1331222401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332805599 + ... + 332805602.

Almost surely, 2^1331222402 is an apocalyptic number.

1331222402 is a deficient number, since it is larger than the sum of its proper divisors (665611204).

1331222402 is an equidigital number, since it uses as much as digits as its factorization.

1331222402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665611203.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1331222402 is about 36485.9205995957. The cubic root of 1331222402 is about 1100.0612643564.

Adding to 1331222402 its reverse (2042221331), we get a palindrome (3373443733).

The spelling of 1331222402 in words is "one billion, three hundred thirty-one million, two hundred twenty-two thousand, four hundred two".