2121312322 has 4 divisors (see below), whose sum is σ = 3181968486. Its totient is φ = 1060656160.

The previous prime is 2121312313. The next prime is 2121312331. The reversal of 2121312322 is 2232131212.

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

It is an interprime number because it is at equal distance from previous prime (2121312313) and next prime (2121312331).

It can be written as a sum of positive squares in only one way, i.e., 2090409841 + 30902481 = 45721^2 + 5559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2121312322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530328079 + ... + 530328082.

Almost surely, 2^2121312322 is an apocalyptic number.

2121312322 is a deficient number, since it is larger than the sum of its proper divisors (1060656164).

2121312322 is a wasteful number, since it uses less digits than its factorization.

2121312322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060656163.

The product of its digits is 288, while the sum is 19.

The square root of 2121312322 is about 46057.7064344285. The cubic root of 2121312322 is about 1284.8966738520.

Adding to 2121312322 its reverse (2232131212), we get a palindrome (4353443534).

The spelling of 2121312322 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, three hundred twenty-two".