202202212021220 has 48 divisors (see below), whose sum is σ = 428931531867888. Its totient is φ = 80060908953600.

The previous prime is 202202212021153. The next prime is 202202212021223. The reversal of 202202212021220 is 22120212202202.

It can be written as a sum of positive squares in 8 ways, for example, as 69416091783424 + 132786120237796 = 8331632^2 + 11523286^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 202202212021192 and 202202212021201.

It is not an unprimeable number, because it can be changed into a prime (202202212021223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3544757 + ... + 20419836.

It is an arithmetic number, because the mean of its divisors is an integer number (8936073580581).

Almost surely, 2^{202202212021220} is an apocalyptic number.

202202212021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202202212021220 is an abundant number, since it is smaller than the sum of its proper divisors (226729319846668).

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

202202212021220 is a wasteful number, since it uses less digits than its factorization.

202202212021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23968880 (or 23968878 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 202202212021220 its reverse (22120212202202), we get a palindrome (224322424223422).

The spelling of 202202212021220 in words is "two hundred two trillion, two hundred two billion, two hundred twelve million, twenty-one thousand, two hundred twenty".