1212022200 has 48 divisors (see below), whose sum is σ = 3757270680. Its totient is φ = 323205760.

The previous prime is 1212022193. The next prime is 1212022211. The reversal of 1212022200 is 22202121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1009419 + ... + 1010618.

Almost surely, 2^1212022200 is an apocalyptic number.

1212022200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212022200 is an abundant number, since it is smaller than the sum of its proper divisors (2545248480).

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

1212022200 is a wasteful number, since it uses less digits than its factorization.

1212022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020056 (or 2020047 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1212022200 is about 34814.1092087676. The cubic root of 1212022200 is about 1066.1955319531.

Adding to 1212022200 its reverse (22202121), we get a palindrome (1234224321).

The spelling of 1212022200 in words is "one billion, two hundred twelve million, twenty-two thousand, two hundred".