1220121101200 has 60 divisors (see below), whose sum is σ = 3025900361728. Its totient is φ = 472304937600.

The previous prime is 1220121101191. The next prime is 1220121101219. The reversal of 1220121101200 is 21011210221.

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, 49186032 + ... + 49210831.

Almost surely, 2^{1220121101200} is an apocalyptic number.

1220121101200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220121101200 is an abundant number, since it is smaller than the sum of its proper divisors (1805779260528).

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

1220121101200 is a wasteful number, since it uses less digits than its factorization.

1220121101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98396912 (or 98396901 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220121101200 its reverse (21011210221), we get a palindrome (1241132311421).

The spelling of 1220121101200 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred".