221021010220110 has 64 divisors (see below), whose sum is σ = 548284406837760. Its totient is φ = 56990135422080.

The previous prime is 221021010220079. The next prime is 221021010220141. The reversal of 221021010220110 is 11022010120122.

It is an interprime number because it is at equal distance from previous prime (221021010220079) and next prime (221021010220141).

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 221021010220110.

It is a congruent number.

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, 1023421762 + ... + 1023637701.

It is an arithmetic number, because the mean of its divisors is an integer number (8566943856840).

Almost surely, 2^{221021010220110} is an apocalyptic number.

221021010220110 is an abundant number, since it is smaller than the sum of its proper divisors (327263396617650).

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

221021010220110 is a wasteful number, since it uses less digits than its factorization.

221021010220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047059593.

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

Adding to 221021010220110 its reverse (11022010120122), we get a palindrome (232043020340232).

The spelling of 221021010220110 in words is "two hundred twenty-one trillion, twenty-one billion, ten million, two hundred twenty thousand, one hundred ten".