202121132220 has 120 divisors (see below), whose sum is σ = 724641729504. Its totient is φ = 46199113344.

The previous prime is 202121132201. The next prime is 202121132231. The reversal of 202121132220 is 22231121202.

202121132220 is a `hidden beast` number, since 202 + 1 + 211 + 32 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202121132193 and 202121132202.

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 39 ways as a sum of consecutive naturals, for example, 8900527 + ... + 8923206.

Almost surely, 2^202121132220 is an apocalyptic number.

202121132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121132220 is an abundant number, since it is smaller than the sum of its proper divisors (522520597284).

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

202121132220 is a wasteful number, since it uses less digits than its factorization.

202121132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17823761 (or 17823750 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 202121132220 its reverse (22231121202), we get a palindrome (224352253422).

The spelling of 202121132220 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty".