1222122402 has 12 divisors (see below), whose sum is σ = 2647931910. Its totient is φ = 407374128.

The previous prime is 1222122371. The next prime is 1222122409. The reversal of 1222122402 is 2042212221.

It can be written as a sum of positive squares in only one way, i.e., 940587561 + 281534841 = 30669^2 + 16779^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67895689 = 1222122402 / (1 + 2 + 2 + 2 + 1 + 2 + 2 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (1222122409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33947827 + ... + 33947862.

Almost surely, 2^1222122402 is an apocalyptic number.

1222122402 is an abundant number, since it is smaller than the sum of its proper divisors (1425809508).

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

1222122402 is a wasteful number, since it uses less digits than its factorization.

1222122402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67895697 (or 67895694 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1222122402 is about 34958.8672871419. The cubic root of 1222122402 is about 1069.1490022253.

Adding to 1222122402 its reverse (2042212221), we get a palindrome (3264334623).

The spelling of 1222122402 in words is "one billion, two hundred twenty-two million, one hundred twenty-two thousand, four hundred two".