1321202122 has 12 divisors (see below), whose sum is σ = 2031323958. Its totient is φ = 644487200.

The previous prime is 1321202119. The next prime is 1321202123. The reversal of 1321202122 is 2212021231.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 141348321 + 1179853801 = 11889^2 + 34349^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321202096 and 1321202105.

It is not an unprimeable number, because it can be changed into a prime (1321202123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193129 + ... + 199852.

Almost surely, 2^1321202122 is an apocalyptic number.

1321202122 is a deficient number, since it is larger than the sum of its proper divisors (710121836).

1321202122 is an equidigital number, since it uses as much as digits as its factorization.

1321202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393065 (or 393024 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1321202122 is about 36348.3441438534. The cubic root of 1321202122 is about 1097.2942097845.

Adding to 1321202122 its reverse (2212021231), we get a palindrome (3533223353).

It can be divided in two parts, 1 and 321202122, that added together give a palindrome (321202123).

The spelling of 1321202122 in words is "one billion, three hundred twenty-one million, two hundred two thousand, one hundred twenty-two".