1220200220100 has 72 divisors (see below), whose sum is σ = 3536629384288. Its totient is φ = 324816825600.

The previous prime is 1220200220087. The next prime is 1220200220101. The reversal of 1220200220100 is 10220020221.

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

It is not an unprimeable number, because it can be changed into a prime (1220200220101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3390289 + ... + 3732888.

Almost surely, 2^{1220200220100} is an apocalyptic number.

1220200220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220200220100 is an abundant number, since it is smaller than the sum of its proper divisors (2316429164188).

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

1220200220100 is a wasteful number, since it uses less digits than its factorization.

1220200220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7123765 (or 7123758 counting only the distinct ones).

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

Adding to 1220200220100 its reverse (10220020221), we get a palindrome (1230420240321).

The spelling of 1220200220100 in words is "one trillion, two hundred twenty billion, two hundred million, two hundred twenty thousand, one hundred".