221011020210 has 64 divisors (see below), whose sum is σ = 536665305600. Its totient is φ = 58243756032.

The previous prime is 221011020179. The next prime is 221011020211. The reversal of 221011020210 is 12020110122.

It is not an unprimeable number, because it can be changed into a prime (221011020211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5364871 + ... + 5405909.

It is an arithmetic number, because the mean of its divisors is an integer number (8385395400).

Almost surely, 2^221011020210 is an apocalyptic number.

221011020210 is an abundant number, since it is smaller than the sum of its proper divisors (315654285390).

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

221011020210 is a wasteful number, since it uses less digits than its factorization.

221011020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43155.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221011020210 its reverse (12020110122), we get a palindrome (233031130332).

The spelling of 221011020210 in words is "two hundred twenty-one billion, eleven million, twenty thousand, two hundred ten".