1211022552 has 32 divisors (see below), whose sum is σ = 3028409280. Its totient is φ = 403560480.

The previous prime is 1211022509. The next prime is 1211022559. The reversal of 1211022552 is 2552201121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211022559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161527 + ... + 168857.

It is an arithmetic number, because the mean of its divisors is an integer number (94637790).

Almost surely, 2^1211022552 is an apocalyptic number.

1211022552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211022552 is an abundant number, since it is smaller than the sum of its proper divisors (1817386728).

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

1211022552 is a wasteful number, since it uses less digits than its factorization.

1211022552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14223 (or 14219 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1211022552 is about 34799.7493094419. The cubic root of 1211022552 is about 1065.9023268212.

Adding to 1211022552 its reverse (2552201121), we get a palindrome (3763223673).

The spelling of 1211022552 in words is "one billion, two hundred eleven million, twenty-two thousand, five hundred fifty-two".