1122021636 has 24 divisors (see below), whose sum is σ = 2619148224. Its totient is φ = 373850400.

The previous prime is 1122021623. The next prime is 1122021653. The reversal of 1122021636 is 6361202211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12286 + ... + 48938.

It is an arithmetic number, because the mean of its divisors is an integer number (109131176).

Almost surely, 2^1122021636 is an apocalyptic number.

It is an amenable number.

1122021636 is an abundant number, since it is smaller than the sum of its proper divisors (1497126588).

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

1122021636 is a wasteful number, since it uses less digits than its factorization.

1122021636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39211 (or 39209 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1122021636 is about 33496.5914086792. The cubic root of 1122021636 is about 1039.1232860443.

Adding to 1122021636 its reverse (6361202211), we get a palindrome (7483223847).

The spelling of 1122021636 in words is "one billion, one hundred twenty-two million, twenty-one thousand, six hundred thirty-six".