1221010122200 has 96 divisors (see below), whose sum is σ = 3107870458560. Its totient is φ = 442434537600.

The previous prime is 1221010122139. The next prime is 1221010122247. The reversal of 1221010122200 is 22210101221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357974 + ... + 1603173.

It is an arithmetic number, because the mean of its divisors is an integer number (32373650610).

Almost surely, 2^{1221010122200} is an apocalyptic number.

1221010122200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221010122200 is an abundant number, since it is smaller than the sum of its proper divisors (1886860336360).

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

1221010122200 is a wasteful number, since it uses less digits than its factorization.

1221010122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961457 (or 1961448 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221010122200 its reverse (22210101221), we get a palindrome (1243220223421).

The spelling of 1221010122200 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred twenty-two thousand, two hundred".