1212022245 has 16 divisors (see below), whose sum is σ = 2216269440. Its totient is φ = 554067264.

The previous prime is 1212022243. The next prime is 1212022291. The reversal of 1212022245 is 5422202121.

It is not a de Polignac number, because 1212022245 - 2¹ = 1212022243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5771430 + ... + 5771639.

It is an arithmetic number, because the mean of its divisors is an integer number (138516840).

Almost surely, 2^1212022245 is an apocalyptic number.

1212022245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212022245 is a deficient number, since it is larger than the sum of its proper divisors (1004247195).

1212022245 is a wasteful number, since it uses less digits than its factorization.

1212022245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543084.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1212022245 is about 34814.1098550573. The cubic root of 1212022245 is about 1066.1955451483.

Adding to 1212022245 its reverse (5422202121), we get a palindrome (6634224366).

The spelling of 1212022245 in words is "one billion, two hundred twelve million, twenty-two thousand, two hundred forty-five".