221010120111210 has 32 divisors (see below), whose sum is σ = 534600857475072. Its totient is φ = 58471968784320.

The previous prime is 221010120111199. The next prime is 221010120111217. The reversal of 221010120111210 is 12111021010122.

It is a happy number.

221010120111210 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 221010120111210.

It is not an unprimeable number, because it can be changed into a prime (221010120111217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29003948961 + ... + 29003956580.

It is an arithmetic number, because the mean of its divisors is an integer number (16706276796096).

Almost surely, 2^{221010120111210} is an apocalyptic number.

221010120111210 is an abundant number, since it is smaller than the sum of its proper divisors (313590737363862).

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

221010120111210 is a wasteful number, since it uses less digits than its factorization.

221010120111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58007905678.

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

Adding to 221010120111210 its reverse (12111021010122), we get a palindrome (233121141121332).

The spelling of 221010120111210 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty million, one hundred eleven thousand, two hundred ten".