221001220011210 has 64 divisors (see below), whose sum is σ = 544217356609920. Its totient is φ = 57403366456320.

The previous prime is 221001220011193. The next prime is 221001220011211. The reversal of 221001220011210 is 12110022100122.

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 221001220011210.

It is not an unprimeable number, because it can be changed into a prime (221001220011211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144372547 + ... + 145895286.

It is an arithmetic number, because the mean of its divisors is an integer number (8503396197030).

Almost surely, 2^{221001220011210} is an apocalyptic number.

221001220011210 is an abundant number, since it is smaller than the sum of its proper divisors (323216136598710).

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

221001220011210 is a wasteful number, since it uses less digits than its factorization.

221001220011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290268503.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001220011210 its reverse (12110022100122), we get a palindrome (233111242111332).

The spelling of 221001220011210 in words is "two hundred twenty-one trillion, one billion, two hundred twenty million, eleven thousand, two hundred ten".