12210220100 has 72 divisors (see below), whose sum is σ = 28558463808. Its totient is φ = 4504579200.

The previous prime is 12210220091. The next prime is 12210220147. The reversal of 12210220100 is 102201221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1877855 + ... + 1884345.

Almost surely, 2^12210220100 is an apocalyptic number.

12210220100 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 12210220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14279231904).

12210220100 is an abundant number, since it is smaller than the sum of its proper divisors (16348243708).

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

12210220100 is a wasteful number, since it uses less digits than its factorization.

12210220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965 (or 7958 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12210220100 its reverse (102201221), we get a palindrome (12312421321).

The spelling of 12210220100 in words is "twelve billion, two hundred ten million, two hundred twenty thousand, one hundred".