202120021221200 has 120 divisors (see below), whose sum is σ = 487483930745856. Its totient is φ = 80533664640000.

The previous prime is 202120021221169. The next prime is 202120021221247. The reversal of 202120021221200 is 2122120021202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151729244 + ... + 153055556.

Almost surely, 2^{202120021221200} is an apocalyptic number.

202120021221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202120021221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243741965372928).

202120021221200 is an abundant number, since it is smaller than the sum of its proper divisors (285363909524656).

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

202120021221200 is a wasteful number, since it uses less digits than its factorization.

202120021221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327813 (or 1327802 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202120021221200 its reverse (2122120021202), we get a palindrome (204242141242402).

The spelling of 202120021221200 in words is "two hundred two trillion, one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, two hundred".