1131222402 has 16 divisors (see below), whose sum is σ = 2513827680. Its totient is φ = 377074116.

The previous prime is 1131222373. The next prime is 1131222403. The reversal of 1131222402 is 2042221311.

It is a happy number.

1131222402 is a `hidden beast` number, since 11 + 31 + 222 + 402 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1131222403) 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 7 ways as a sum of consecutive naturals, for example, 10474228 + ... + 10474335.

It is an arithmetic number, because the mean of its divisors is an integer number (157114230).

Almost surely, 2^1131222402 is an apocalyptic number.

1131222402 is an abundant number, since it is smaller than the sum of its proper divisors (1382605278).

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

1131222402 is a wasteful number, since it uses less digits than its factorization.

1131222402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20948574 (or 20948568 counting only the distinct ones).

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

The square root of 1131222402 is about 33633.6498465451. The cubic root of 1131222402 is about 1041.9558860295.

Adding to 1131222402 its reverse (2042221311), we get a palindrome (3173443713).

The spelling of 1131222402 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred two".