1212022222200 has 72 divisors (see below), whose sum is σ = 4070374635600. Its totient is φ = 323205925440.

The previous prime is 1212022222181. The next prime is 1212022222207. The reversal of 1212022222200 is 22222202121.

1212022222200 is a `hidden beast` number, since 1 + 21 + 202 + 222 + 220 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022222207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 336671040 + ... + 336674639.

It is an arithmetic number, because the mean of its divisors is an integer number (56532981050).

Almost surely, 2^{1212022222200} is an apocalyptic number.

1212022222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212022222200 is an abundant number, since it is smaller than the sum of its proper divisors (2858352413400).

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

1212022222200 is a wasteful number, since it uses less digits than its factorization.

1212022222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673345701 (or 673345689 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1212022222200 its reverse (22222202121), we get a palindrome (1234244424321).

The spelling of 1212022222200 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred twenty-two thousand, two hundred".