221312040210 has 80 divisors (see below), whose sum is σ = 600543207000. Its totient is φ = 58475084544.

The previous prime is 221312040181. The next prime is 221312040233. The reversal of 221312040210 is 12040213122.

It is a happy number.

221312040210 is a `hidden beast` number, since 221 + 31 + 2 + 0 + 402 + 10 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 207413752329 + 13898287881 = 455427^2 + 117891^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1165035 + ... + 1341614.

Almost surely, 2^221312040210 is an apocalyptic number.

221312040210 is an abundant number, since it is smaller than the sum of its proper divisors (379231166790).

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

221312040210 is a wasteful number, since it uses less digits than its factorization.

221312040210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506777 (or 2506768 counting only the distinct ones).

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

Adding to 221312040210 its reverse (12040213122), we get a palindrome (233352253332).

The spelling of 221312040210 in words is "two hundred twenty-one billion, three hundred twelve million, forty thousand, two hundred ten".