221444421412331 has 32 divisors (see below), whose sum is σ = 242594280548928. Its totient is φ = 200908017999360.

The previous prime is 221444421412307. The next prime is 221444421412339. The reversal of 221444421412331 is 133214124444122.

221444421412331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221444421412331 - 2²² = 221444417218027 is a prime.

It is a super-2 number, since 2×221444421412331² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221444421412339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3987016421 + ... + 3987071961.

It is an arithmetic number, because the mean of its divisors is an integer number (7581071267154).

Almost surely, 2^{221444421412331} is an apocalyptic number.

221444421412331 is a deficient number, since it is larger than the sum of its proper divisors (21149859136597).

221444421412331 is a wasteful number, since it uses less digits than its factorization.

221444421412331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74591.

The product of its digits is 147456, while the sum is 38.

Adding to 221444421412331 its reverse (133214124444122), we get a palindrome (354658545856453).

The spelling of 221444421412331 in words is "two hundred twenty-one trillion, four hundred forty-four billion, four hundred twenty-one million, four hundred twelve thousand, three hundred thirty-one".