1220122022100 has 36 divisors (see below), whose sum is σ = 3530219718144. Its totient is φ = 325365872480.

The previous prime is 1220122022099. The next prime is 1220122022113. The reversal of 1220122022100 is 12202210221.

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 1220122022100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2033536404 + ... + 2033537003.

Almost surely, 2^{1220122022100} is an apocalyptic number.

1220122022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220122022100 is an abundant number, since it is smaller than the sum of its proper divisors (2310097696044).

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

1220122022100 is a wasteful number, since it uses less digits than its factorization.

1220122022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067073424 (or 4067073417 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220122022100 its reverse (12202210221), we get a palindrome (1232324232321).

The spelling of 1220122022100 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, twenty-two thousand, one hundred".