212221121021010 has 24 divisors (see below), whose sum is σ = 551774914654860. Its totient is φ = 56592298938912.

The previous prime is 212221121021003. The next prime is 212221121021047. The reversal of 212221121021010 is 10120121122212.

212221121021010 is a `hidden beast` number, since 2 + 1 + 22 + 211 + 210 + 210 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 212210104209489 + 11016811521 = 14567433^2 + 104961^2 .

It is a super-2 number, since 2×212221121021010² (a number of 29 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1179006227805 + ... + 1179006227984.

Almost surely, 2^{212221121021010} is an apocalyptic number.

212221121021010 is an abundant number, since it is smaller than the sum of its proper divisors (339553793633850).

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

212221121021010 is a wasteful number, since it uses less digits than its factorization.

212221121021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358012455802 (or 2358012455799 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212221121021010 its reverse (10120121122212), we get a palindrome (222341242143222).

The spelling of 212221121021010 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, ten".