402212403220 has 12 divisors (see below), whose sum is σ = 844646046804. Its totient is φ = 160884961280.

The previous prime is 402212403211. The next prime is 402212403223. The reversal of 402212403220 is 22304212204.

It can be written as a sum of positive squares in 2 ways, for example, as 163994221444 + 238218181776 = 404962^2 + 488076^2 .

It is a super-3 number, since 3×402212403220³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402212403191 and 402212403200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402212403223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055310061 + ... + 10055310100.

It is an arithmetic number, because the mean of its divisors is an integer number (70387170567).

Almost surely, 2^402212403220 is an apocalyptic number.

It is an amenable number.

402212403220 is an abundant number, since it is smaller than the sum of its proper divisors (442433643584).

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

402212403220 is a wasteful number, since it uses less digits than its factorization.

402212403220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20110620170 (or 20110620168 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 402212403220 its reverse (22304212204), we get a palindrome (424516615424).

The spelling of 402212403220 in words is "four hundred two billion, two hundred twelve million, four hundred three thousand, two hundred twenty".