1321142202 has 24 divisors (see below), whose sum is σ = 2939840436. Its totient is φ = 428478336.

The previous prime is 1321142189. The next prime is 1321142213. The reversal of 1321142202 is 2022411231.

It is a happy number.

1321142202 is a `hidden beast` number, since 1 + 321 + 142 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1149820281 + 171321921 = 33909^2 + 13089^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 991183 + ... + 992514.

Almost surely, 2^1321142202 is an apocalyptic number.

1321142202 is an abundant number, since it is smaller than the sum of its proper divisors (1618698234).

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

1321142202 is a wasteful number, since it uses less digits than its factorization.

1321142202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983742 (or 1983739 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1321142202 is about 36347.5198878823. The cubic root of 1321142202 is about 1097.2776211384.

Adding to 1321142202 its reverse (2022411231), we get a palindrome (3343553433).

The spelling of 1321142202 in words is "one billion, three hundred twenty-one million, one hundred forty-two thousand, two hundred two".