12212011500 has 192 divisors, whose sum is σ = 38395873152. Its totient is φ = 2998272000.

The previous prime is 12212011459. The next prime is 12212011501. The reversal of 12212011500 is 511021221.

It is a super-2 number, since 2×12212011500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12212011500.

It is not an unprimeable number, because it can be changed into a prime (12212011501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12499012 + ... + 12499988.

It is an arithmetic number, because the mean of its divisors is an integer number (199978506).

Almost surely, 2^12212011500 is an apocalyptic number.

12212011500 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 12212011500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19197936576).

12212011500 is an abundant number, since it is smaller than the sum of its proper divisors (26183861652).

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

12212011500 is a wasteful number, since it uses less digits than its factorization.

12212011500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 12212011500 its reverse (511021221), we get a palindrome (12723032721).

The spelling of 12212011500 in words is "twelve billion, two hundred twelve million, eleven thousand, five hundred".