12211212020100 has 144 divisors (see below), whose sum is σ = 36303658583808. Its totient is φ = 3166772751360.

The previous prime is 12211212020087. The next prime is 12211212020179. The reversal of 12211212020100 is 102021211221.

It is a super-2 number, since 2×12211212020100² (a number of 27 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 12211212020100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22632672 + ... + 23165928.

Almost surely, 2^{12211212020100} is an apocalyptic number.

12211212020100 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 12211212020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18151829291904).

12211212020100 is an abundant number, since it is smaller than the sum of its proper divisors (24092446563708).

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

12211212020100 is a wasteful number, since it uses less digits than its factorization.

12211212020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535374 (or 535367 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211212020100 its reverse (102021211221), we get a palindrome (12313233231321).

The spelling of 12211212020100 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, twenty thousand, one hundred".