221110021221210 has 160 divisors (see below), whose sum is σ = 648613245753792. Its totient is φ = 53600458302720.

The previous prime is 221110021221179. The next prime is 221110021221251. The reversal of 221110021221210 is 12122120011122.

221110021221210 is a `hidden beast` number, since 2 + 211 + 1 + 0 + 0 + 21 + 221 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 249545629 + ... + 250430111.

Almost surely, 2^{221110021221210} is an apocalyptic number.

221110021221210 is an abundant number, since it is smaller than the sum of its proper divisors (427503224532582).

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

221110021221210 is a wasteful number, since it uses less digits than its factorization.

221110021221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912570 (or 912561 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221110021221210 its reverse (12122120011122), we get a palindrome (233232141232332).

The spelling of 221110021221210 in words is "two hundred twenty-one trillion, one hundred ten billion, twenty-one million, two hundred twenty-one thousand, two hundred ten".