12211902901800 has 432 divisors, whose sum is σ = 47715762273660. Its totient is φ = 2790803957760.

The previous prime is 12211902901753. The next prime is 12211902901831. The reversal of 12211902901800 is 810920911221.

12211902901800 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 190 + 290 + 180 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 727571468484 + 11484331433316 = 852978^2 + 3388854^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 816459922 + ... + 816474878.

Almost surely, 2^{12211902901800} is an apocalyptic number.

12211902901800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211902901800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23857881136830).

12211902901800 is an abundant number, since it is smaller than the sum of its proper divisors (35503859371860).

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

12211902901800 is a wasteful number, since it uses less digits than its factorization.

12211902901800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24250 (or 24231 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 12211902901800 in words is "twelve trillion, two hundred eleven billion, nine hundred two million, nine hundred one thousand, eight hundred".