1221001202200 has 48 divisors (see below), whose sum is σ = 3057199170480. Its totient is φ = 450831212160.

The previous prime is 1221001202189. The next prime is 1221001202233. The reversal of 1221001202200 is 22021001221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 234805324 + ... + 234810523.

It is an arithmetic number, because the mean of its divisors is an integer number (63691649385).

Almost surely, 2^{1221001202200} is an apocalyptic number.

1221001202200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221001202200 is an abundant number, since it is smaller than the sum of its proper divisors (1836197968280).

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

1221001202200 is a wasteful number, since it uses less digits than its factorization.

1221001202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469615876 (or 469615867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1221001202200 its reverse (22021001221), we get a palindrome (1243022203421).

The spelling of 1221001202200 in words is "one trillion, two hundred twenty-one billion, one million, two hundred two thousand, two hundred".