221121020120110 has 64 divisors (see below), whose sum is σ = 445944042938304. Its totient is φ = 78233131238400.

The previous prime is 221121020120071. The next prime is 221121020120219. The reversal of 221121020120110 is 11021020121122.

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, 255901354 + ... + 256763986.

It is an arithmetic number, because the mean of its divisors is an integer number (6967875670911).

Almost surely, 2^{221121020120110} is an apocalyptic number.

221121020120110 is an abundant number, since it is smaller than the sum of its proper divisors (224823022818194).

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

221121020120110 is a wasteful number, since it uses less digits than its factorization.

221121020120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925669.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121020120110 its reverse (11021020121122), we get a palindrome (232142040241232).

The spelling of 221121020120110 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty million, one hundred twenty thousand, one hundred ten".