12211201000 has 64 divisors (see below), whose sum is σ = 28734264000. Its totient is φ = 4857121600.

The previous prime is 12211200973. The next prime is 12211201001. The reversal of 12211201000 is 10211221.

It is a super-2 number, since 2×12211201000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12211201001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144891 + ... + 213109.

It is an arithmetic number, because the mean of its divisors is an integer number (448972875).

Almost surely, 2^12211201000 is an apocalyptic number.

12211201000 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 12211201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14367132000).

12211201000 is an abundant number, since it is smaller than the sum of its proper divisors (16523063000).

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

12211201000 is a wasteful number, since it uses less digits than its factorization.

12211201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68419 (or 68405 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12211201000 its reverse (10211221), we get a palindrome (12221412221).

The spelling of 12211201000 in words is "twelve billion, two hundred eleven million, two hundred one thousand".