1201220200 has 48 divisors (see below), whose sum is σ = 2797454880. Its totient is φ = 479693760.

The previous prime is 1201220197. The next prime is 1201220203. The reversal of 1201220200 is 20221021.

It is an interprime number because it is at equal distance from previous prime (1201220197) and next prime (1201220203).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1201220203) 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, 124759 + ... + 134041.

It is an arithmetic number, because the mean of its divisors is an integer number (58280310).

Almost surely, 2^1201220200 is an apocalyptic number.

1201220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201220200 is an abundant number, since it is smaller than the sum of its proper divisors (1596234680).

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

1201220200 is a wasteful number, since it uses less digits than its factorization.

1201220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9946 (or 9937 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1201220200 is about 34658.6237464790. The cubic root of 1201220200 is about 1063.0186293881.

Adding to 1201220200 its reverse (20221021), we get a palindrome (1221441221).

The spelling of 1201220200 in words is "one billion, two hundred one million, two hundred twenty thousand, two hundred".