221211412232104 has 128 divisors (see below), whose sum is σ = 492478421460480. Its totient is φ = 91180977868800.

The previous prime is 221211412232093. The next prime is 221211412232113. The reversal of 221211412232104 is 401232214112122.

It is a happy number.

221211412232104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 343777789 + ... + 344420659.

It is an arithmetic number, because the mean of its divisors is an integer number (3847487667660).

Almost surely, 2^{221211412232104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221211412232104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246239210730240).

221211412232104 is an abundant number, since it is smaller than the sum of its proper divisors (271267009228376).

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

221211412232104 is a wasteful number, since it uses less digits than its factorization.

221211412232104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645051 (or 645047 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 221211412232104 its reverse (401232214112122), we get a palindrome (622443626344226).

The spelling of 221211412232104 in words is "two hundred twenty-one trillion, two hundred eleven billion, four hundred twelve million, two hundred thirty-two thousand, one hundred four".