221211020111120 has 160 divisors (see below), whose sum is σ = 558279381832704. Its totient is φ = 81030339072000.

The previous prime is 221211020111117. The next prime is 221211020111149. The reversal of 221211020111120 is 21111020112122.

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, 118581929 + ... + 120432951.

Almost surely, 2^{221211020111120} is an apocalyptic number.

221211020111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221211020111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279139690916352).

221211020111120 is an abundant number, since it is smaller than the sum of its proper divisors (337068361721584).

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

221211020111120 is a wasteful number, since it uses less digits than its factorization.

221211020111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851961 (or 1851955 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221211020111120 its reverse (21111020112122), we get a palindrome (242322040223242).

The spelling of 221211020111120 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, one hundred twenty".