221021121001110 has 128 divisors (see below), whose sum is σ = 586082686869504. Its totient is φ = 53059301898240.

The previous prime is 221021121001081. The next prime is 221021121001141. The reversal of 221021121001110 is 11100121120122.

It is a happy number.

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 221021121001110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1061777640 + ... + 1061985780.

It is an arithmetic number, because the mean of its divisors is an integer number (4578770991168).

Almost surely, 2^{221021121001110} is an apocalyptic number.

221021121001110 is an abundant number, since it is smaller than the sum of its proper divisors (365061565868394).

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

221021121001110 is a wasteful number, since it uses less digits than its factorization.

221021121001110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298718.

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

Adding to 221021121001110 its reverse (11100121120122), we get a palindrome (232121242121232).

The spelling of 221021121001110 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, one thousand, one hundred ten".