221010111012210 has 64 divisors (see below), whose sum is σ = 582003984699648. Its totient is φ = 53376026805504.

The previous prime is 221010111012209. The next prime is 221010111012217. The reversal of 221010111012210 is 12210111010122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221010111012210.

It is not an unprimeable number, because it can be changed into a prime (221010111012217) 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, 5346135862 + ... + 5346177201.

It is an arithmetic number, because the mean of its divisors is an integer number (9093812260932).

Almost surely, 2^{221010111012210} is an apocalyptic number.

221010111012210 is an abundant number, since it is smaller than the sum of its proper divisors (360993873687438).

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

221010111012210 is a wasteful number, since it uses less digits than its factorization.

221010111012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10692313139.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221010111012210 its reverse (12210111010122), we get a palindrome (233220222022332).

The spelling of 221010111012210 in words is "two hundred twenty-one trillion, ten billion, one hundred eleven million, twelve thousand, two hundred ten".