1220213322100 has 36 divisors (see below), whose sum is σ = 2649195933664. Its totient is φ = 487839610080.

The previous prime is 1220213322089. The next prime is 1220213322103. The reversal of 1220213322100 is 12233120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220213322103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2871792 + ... + 3269191.

Almost surely, 2^{1220213322100} is an apocalyptic number.

1220213322100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220213322100 is an abundant number, since it is smaller than the sum of its proper divisors (1428982611564).

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

1220213322100 is a wasteful number, since it uses less digits than its factorization.

1220213322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6142984 (or 6142977 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1220213322100 its reverse (12233120221), we get a palindrome (1232446442321).

The spelling of 1220213322100 in words is "one trillion, two hundred twenty billion, two hundred thirteen million, three hundred twenty-two thousand, one hundred".