1220002022100 has 36 divisors (see below), whose sum is σ = 3529872518144. Its totient is φ = 325333872480.

The previous prime is 1220002022087. The next prime is 1220002022101. The reversal of 1220002022100 is 12202000221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002022101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2033336404 + ... + 2033337003.

Almost surely, 2^{1220002022100} is an apocalyptic number.

1220002022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220002022100 is an abundant number, since it is smaller than the sum of its proper divisors (2309870496044).

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

1220002022100 is a wasteful number, since it uses less digits than its factorization.

1220002022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066673424 (or 4066673417 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1220002022100 its reverse (12202000221), we get a palindrome (1232204022321).

The spelling of 1220002022100 in words is "one trillion, two hundred twenty billion, two million, twenty-two thousand, one hundred".