221211312112110 has 64 divisors (see below), whose sum is σ = 548948101017600. Its totient is φ = 56991486589440.

The previous prime is 221211312112067. The next prime is 221211312112157. The reversal of 221211312112110 is 11211213112122.

221211312112110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221211312112110² (a number of 29 digits) contains 22 as substring.

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, 197991867 + ... + 199106006.

It is an arithmetic number, because the mean of its divisors is an integer number (8577314078400).

Almost surely, 2^{221211312112110} is an apocalyptic number.

221211312112110 is an abundant number, since it is smaller than the sum of its proper divisors (327736788905490).

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

221211312112110 is a wasteful number, since it uses less digits than its factorization.

221211312112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397098513.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 221211312112110 its reverse (11211213112122), we get a palindrome (232422525224232).

The spelling of 221211312112110 in words is "two hundred twenty-one trillion, two hundred eleven billion, three hundred twelve million, one hundred twelve thousand, one hundred ten".