202122003420 has 72 divisors (see below), whose sum is σ = 645372021840. Its totient is φ = 51062400000.

The previous prime is 202122003403. The next prime is 202122003427. The reversal of 202122003420 is 24300221202.

202122003420 is a `hidden beast` number, since 2 + 0 + 21 + 220 + 0 + 3 + 420 = 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 = 202122003393 and 202122003402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122003427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29546581 + ... + 29553420.

Almost surely, 2^202122003420 is an apocalyptic number.

202122003420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202122003420 is an abundant number, since it is smaller than the sum of its proper divisors (443250018420).

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

202122003420 is a wasteful number, since it uses less digits than its factorization.

202122003420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59100035 (or 59100030 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 202122003420 its reverse (24300221202), we get a palindrome (226422224622).

The spelling of 202122003420 in words is "two hundred two billion, one hundred twenty-two million, three thousand, four hundred twenty".