221012220020210 has 32 divisors (see below), whose sum is σ = 398744497796400. Its totient is φ = 88200117577728.

The previous prime is 221012220020201. The next prime is 221012220020243. The reversal of 221012220020210 is 12020022210122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 184349836847401 + 36662383172809 = 13577549^2 + 6054947^2 .

It is a super-3 number, since 3×221012220020210³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6682487 + ... + 22060826.

Almost surely, 2^{221012220020210} is an apocalyptic number.

221012220020210 is a deficient number, since it is larger than the sum of its proper divisors (177732277776190).

221012220020210 is a wasteful number, since it uses less digits than its factorization.

221012220020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28745102.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221012220020210 its reverse (12020022210122), we get a palindrome (233032242230332).

The spelling of 221012220020210 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty million, twenty thousand, two hundred ten".