1021313202122 has 4 divisors (see below), whose sum is σ = 1531969803186. Its totient is φ = 510656601060.

The previous prime is 1021313202121. The next prime is 1021313202199. The reversal of 1021313202122 is 2212023131201.

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., 729843867481 + 291469334641 = 854309^2 + 539879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021313202094 and 1021313202103.

It is not an unprimeable number, because it can be changed into a prime (1021313202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255328300529 + ... + 255328300532.

Almost surely, 2^{1021313202122} is an apocalyptic number.

1021313202122 is a deficient number, since it is larger than the sum of its proper divisors (510656601064).

1021313202122 is an equidigital number, since it uses as much as digits as its factorization.

1021313202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510656601063.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1021313202122 its reverse (2212023131201), we get a palindrome (3233336333323).

The spelling of 1021313202122 in words is "one trillion, twenty-one billion, three hundred thirteen million, two hundred two thousand, one hundred twenty-two".