221110021111210 has 64 divisors (see below), whose sum is σ = 496211517020160. Its totient is φ = 68916552102720.

The previous prime is 221110021111099. The next prime is 221110021111247. The reversal of 221110021111210 is 12111120011122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61631971 + ... + 65120809.

It is an arithmetic number, because the mean of its divisors is an integer number (7753304953440).

Almost surely, 2^{221110021111210} is an apocalyptic number.

221110021111210 is an abundant number, since it is smaller than the sum of its proper divisors (275101495908950).

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

221110021111210 is a wasteful number, since it uses less digits than its factorization.

221110021111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571171.

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

Adding to 221110021111210 its reverse (12111120011122), we get a palindrome (233221141122332).

The spelling of 221110021111210 in words is "two hundred twenty-one trillion, one hundred ten billion, twenty-one million, one hundred eleven thousand, two hundred ten".